DNA Mix Pack Grow Calendar & Space Planning: How to Manage Mixed Strain Grows

Home

Cannabis

DNA Mix Pack Grow Calendar & Space Planning: How to Manage Mixed Strain Grows

Growing a DNA Mix Pack means cultivating multiple cannabis strains at once – an exciting opportunity for variety, but one that requires careful scheduling and space management. Buyers often ask how to plan the vegetative and flowering stages when each strain may finish at different times. In this guide, we’ll walk you through creating a grow calendar for mixed strains and offer space planning tips to handle different plant sizes and staggered harvests. Whether you’re growing indoors or outdoors, photoperiod or autoflower strains (or both), this schedule-oriented guide will help you maximize your mix pack’s potential for a bountiful, coordinated harvest.

What Is a DNA Mix Pack? (And What to Expect)

A DNA Mix Pack is a bundle of diverse cannabis seed genetics from DNA Genetics, potentially including indica, sativa, and hybrid strains in one package. These packs contain a mystery selection of seeds – you might get couch-lock indicas like Kushberry or an uplifting sativa like Cannalope Haze. The seeds can be feminized or regular photoperiod seeds (requiring light cycle changes to flower), and DNA Genetics also offers an Auto Mix Pack with autoflowering seeds. The mix pack’s appeal is variety, but that variety comes with differing growth traits:

• Different Flowering Durations: Indica plants might flower in about 7–9 weeks, whereas sativas can take 10–12+ weeks. This means not all plants will be ready to harvest simultaneously.
  
• Varied Heights and Habits: Indicas tend to stay short and bushy, while sativas grow tall and lanky. Hybrids fall somewhere in between. Different heights require canopy management so one plant doesn’t overshadow the others.
  
• Regular vs Feminized Seeds: If your mix pack includes regular seeds, about half could become male plants. You’ll need to identify and remove males early in flowering to prevent unwanted pollination of females (resulting in seedy buds). Feminized seeds will all be female, simplifying this aspect (learn more in our guide on feminized vs regular seeds).
  

Photoperiod vs. Autoflower Considerations: Photoperiod strains rely on changing light cycles (e.g. 12 hours dark) to trigger flowering, whereas autoflower strains (with Cannabis ruderalis genetics) bloom on their own time regardless of light schedule. A photoperiod mix pack allows you to control when flowering starts for all plants, but they may still finish at different times due to genetics. An auto mix pack will have plants automatically entering flower at different ages, which can lead to truly staggered timing. We’ll address scheduling for both types below.

Planning Your Grow Calendar for Mixed Strains

Creating a unified grow calendar for multiple strains starts with understanding the cannabis life cycle and then tailoring it to your strains’ needs. Below, we outline a general timeline for a mixed grow and how to adjust for differences. This assumes you start all seeds at the same time (a common approach for mix packs). Later, we’ll discuss staggering plant start times as an option.

1. Germination and Seedling Stage (Week 0–2)

Begin by germinating your seeds (see our guide on germinating cannabis seeds for best methods). In a mix pack, all seeds typically get a uniform start:

• Weeks 0–1: Germination – Within a few days to a week, seeds sprout and are ready to plant. Start all your mix pack seeds together so they’re on a synced timeline initially.
  
• Weeks 1–2: Seedling stage – Young seedlings require 18 hours of light and 6 hours of dark (18/6) if grown indoors. They are delicate, so keep conditions consistent (warmth, humidity ~65–70%). At this point, you likely won’t notice big differences between strains yet – focus on keeping them healthy and avoid overwatering.
  

Tip: Label each seedling if you know the strain or note any unique traits as they emerge. In a true mystery mix, you might not know which is which, but observing leaf shape can hint at indica vs sativa dominance (indicas have broader leaves, sativas thinner). All seedlings can stay in the same environment initially.

2. Vegetative Stage (Week 3–6+)

In vegetative growth, cannabis plants focus on getting bigger – producing leaves and branches but no buds yet. Photoperiod plants will stay in veg as long as they get long days (e.g. 18/6 light schedule indoors). Autoflowers will only veg for a short period before switching to flowering on their own (often around week 3 or 4 from sprout).

During veg for a mix pack grow:

• Light Schedule: Keep photoperiod strains under 18/6 light indoors. Autos can also grow under 18/6 (or even 20/4) continuously – they don’t need a flip to 12/12. If you are growing photoperiod and autoflower together, maintain 18/6 until autos finish. The photoperiods can simply continue vegging until that point.
  
• Growth Rates: Here you may start seeing differences. For example, a sativa-leaning strain might grow taller faster, while an indica stays shorter and bushier. If one plant is significantly outpacing the others in height, start low-stress training (LST) early. Gently bend and tie down tall branches, or top the plant (remove the growing tip) to encourage bushier growth. This keeps the canopy even across different strains. You can also raise shorter pots on blocks to match heights.
  

• Veg Duration: How long should you veg mixed strains? A common compromise is to veg until the slowest-growing or smallest plant is mature enough (has strong roots and ~5–6 leaf nodes). This often means faster strains might get a bit larger than you intended, but training can manage that. Typically 4–6 weeks of veg is sufficient for most strains. If you have only photoperiod plants, you could extend veg to 7–8 weeks to let any runts catch up, but be cautious of overall plant size.
  
• Outdoor Consideration: If growing outdoors, vegetative length is dictated by season. All plants will veg through spring and early summer. Indica plants may show pre-flowers (sex) and be ready to bloom a bit earlier than sativas, but actual flowering outdoors won’t start until daylight shortens enough (late summer). Just ensure all plants get plenty of sun and don’t let faster ones shade the slower ones – pruning or moving containers can help.
  

3. Transition to Flowering (Photoperiod) or Early Flower (Autoflower)

This is where photoperiod and autoflower schedules diverge significantly:

• Indoors Photoperiod: When your plants have reached a good size (often about half your available final height – remember many strains can double in height after flip), switch your lights to a 12/12 schedule (12 hours light, 12 dark) to initiate flowering. In a mixed grow, coordinate the flip so that even the longer-flowering sativa will have enough time to finish before you need the space or before outdoor frost (if applicable). It’s okay if one strain could have vegged longer – you can still get a great yield by flipping on the early side, especially if that strain is a stretcher. Mark the date of the flip on your calendar – this is “Flower Week 1” for all photoperiod plants.
  
• Autoflower Mix: There’s no flip needed. By week 4–5 from germination, you’ll likely see the first autos starting to pre-flower (white pistils forming at nodes). They will enter flowering while some of the others might still be in an earlier growth stage. Continue providing an 18/6 light cycle (or sunlight outdoors). All autos in the mix will be on their individual countdowns to harvest based on genetics (commonly 8–12 weeks total lifecycle). It’s a good practice to note when each auto shows flowers – this gives a hint of which might finish first (some autos finish ~4 weeks after first pistils, others take 6+ weeks of bloom).
  

Managing Mixed Photoperiod & Auto Together: If you decided to grow both types in one space, one popular strategy is: keep photoperiod plants in vegetative stage while autos flower and finish. For instance, you can maintain 18/6 lighting. The photoperiods stay in veg (and can even be trained larger) while your autoflowers bloom under the same light. After the autos are harvested, you then switch the remaining photoperiod plants to 12/12 to flower them. This way, you get an early autoflower harvest without delaying the photoperiod yield by too much – essentially a staggered crop. Just be mindful that photoperiods might get quite large after an extended veg, so prune or ScrOG accordingly.

4. Flowering Stage and Staggered Harvests (Week 7 and beyond)

Now the flowering calendar unfolds. In a uniform single-strain grow, all plants hit milestones together. In a mix pack grow, you’ll need to track each strain’s progress individually. Here’s how to navigate it:

• Indoor Photoperiod Flowering: Starting from the flip (Flower Week 1), most indica-dominant strains will be ready to harvest in about 8 weeks of flowering, whereas sativa-dominant ones may need 10–12 weeks. This means if you flipped all at once, some plants will mature earlier. Monitor trichomes and pistils on each plant as harvest time nears. When an indica strain’s buds turn cloudy/amber and pistils are mostly brown, you’ll know it’s harvest-ready (perhaps around Flower Week 8 or 9). Meanwhile, the sativa next to it might still have clear trichomes and white pistils, indicating a few weeks to go. Plan to harvest each plant at its peak, not all at once. This staggered harvest ensures optimal potency and flavor for each cultivar. We’ll cover how to handle space and drying in a moment.
  
• Autoflower Flowering: If all your seeds are autos, they will naturally stagger. For example, in a mix you might have one auto ready at week 8 from seed, another at week 10, and a slow one at week 12. Continue regular feeding and care for each according to its stage – while one plant is flushing for harvest (receiving only water in the final week or two), others might still be mid-bloom and need nutrients. As each auto’s buds ripen, pick the ideal day to chop. Autoflowers often give visual cues: the early-finisher’s leaves may yellow as it ripens around week 8–9, whereas later-finishing plants stay green and keep fattening up buds.
  
• Outdoor Flowering: Outdoors, the “calendar” is set by nature. All photoperiod plants will start flowering as the days shorten (usually late summer). Indica strains typically finish by early autumn (avoiding early frost), while sativas can go into late autumn. In a mix, you might harvest an indica in, say, late September, while a haze hybrid might not be ready until late October. Be prepared with any necessary weather protection (greenhouse, tarp, etc.) for late-finishers. Staggered outdoor harvests are common – just ensure your drying space is ready and that remaining plants are cared for post-harvest of others.
  

Sample Timeline Overview

To visualize a mixed grow schedule, here’s an example timeline comparing a photoperiod-only mix vs. an autoflower mix (assuming an indoor scenario for simplicity):

Stage	Photoperiod Mix (Example)	Autoflower Mix (Example)
Germination & Seedling	Week 0–2: All seeds germinate and establish seedlings (18/6 light).	Week 0–2: All seeds germinate and establish seedlings (18/6 light).
Vegetative Growth	Week 3–6: All plants veg under 18/6. Faster-growing strains may be topped or LST’d. Veg extended until smallest plant is ready.	Week 3–4: Autos veg briefly under 18/6. First pre-flowers may appear by end of week 4 for fast strains.
Transition to Flower	Week 7: Switch to 12/12 bloom cycle for all plants. Flowering begins uniformly (Flower Week 1).	Week 5–6: Autos enter early flowering on their own (no light change). Some plants continue vegetative growth longer if they are slower autos.
Mid Flower	Weeks 8–13: All plants are in flowering. By ~Flower Week 4–5, indicas bulk up; sativas still stretching. Week 14 (Flower Week 8): Fastest strain (indica) ripens – ready to harvest. Others still maturing.	Weeks 7–9: Fastest auto strain approaches maturity around Week 8 from seed – begin flush and harvest when ready. Others are mid-flower. Maintain 18/6 light.
Late Flower & Harvest	Weeks 14–16: Remaining sativa or hybrid strains finish flowering around Flower Week 10–12. Harvest each as it becomes ready (potentially one in Week 15, one in 16). By end of Week 16, all photoperiod plants have been harvested.	Weeks 10–12: Second auto strain finishes around Week 10, last one by Week 12. Harvest each plant individually at peak ripeness. Some autos may even go longer, but most will be done by 12 weeks.
Post-Harvest & Next Steps	Early-finishing plants freed space by Week 14, allowing more light/air for remaining plants. After final harvest at Week 16, you can sanitize the grow space and start your next cycle (or dry/cure buds in the tent if no new plants).	As each auto is harvested, you could start a new seed in that space (under 18/6 it will sprout and veg while others finish flowering). This creates a rolling or perpetual harvest. Alternatively, after the last plant is harvested by Week 12, reset for the next grow.

Note: The above is a generalized example. Actual times will vary based on the specific strains in your mix pack. Always observe your plants’ trichomes and health rather than sticking rigidly to a preset timeline.

5. Space Planning and Canopy Management

One of the biggest challenges in a mixed grow is managing space so that each plant thrives. Different strains not only grow to different heights, but can also have varying branch structures and foliage density. Here’s how to plan and optimize your grow space:

• Even Canopy is Key: Aim to keep all plant tops at roughly the same height for maximum light exposure. Use tools like the Screen of Green (ScrOG) method or plant training to achieve this. ScrOG involves placing a screen or net above the plants and weaving branches through it, forcing them to grow horizontally and evenly. This technique can drastically help when one strain is naturally tall and another is short – the tall one can be spread wider under the screen while the short one catches up. Even simple LST (low-stress training), like bending and tying branches, prevents a taller plant from hogging the light. You can also place shorter plants on risers or stools to match the canopy height of taller neighbors.
  
• Avoid Overcrowding: When planting a mix pack, it’s easy to be optimistic and fill every square inch with young plants. But remember, they will grow – sometimes vigorously! Overcrowded grow spaces lead to poor light penetration (small lower buds) and can trap humidity, inviting mold and pests. Give each plant enough elbow room. As a guideline, indoors in a tent, you might grow e.g. four plants in a 4×4 ft space; if you had four very bushy strains, even that could become tight. If you notice leaves of different plants constantly overlapping and thick bushy interiors, prune some lower growth for better airflow. Good ventilation (fans, exhaust) is a must, especially when canopies of mixed strains create dense foliage. Adequate spacing and pruning will help prevent problems like powdery mildew and bud rot in an overcrowded garden.
  
• Different Nutrient Needs: Another aspect of space planning is being able to access each plant for care. Different strains may have unique feeding requirements – one might show nutrient burn while another hungers for more. Make sure you can reach all pots to water and check runoff individually. If using one reservoir for multiple plants (hydroponics), you’re forced to feed all the same; in soil or coco, you can adjust per plant. Consider grouping plants by vigor or appetite (if known) so you can cater to their needs more easily.
  
• Plan for Vertical Space: Indicas being short might only reach, say, 3–4 feet tall at finish, whereas a sativa could stretch to 5–6+ feet if unchecked. Ensure your grow area height can accommodate the tallest possibility (including some clearance from lights). Use topping or super-cropping (bending stems) for tall strains if needed to keep them away from lights. If you’re indoors, flipping to flower a bit earlier (when plants reach about half your maximum height) will help keep tall genetics in check.
  
• Dealing with Males (Regular Seeds): If growing regular seeds, have a plan for removing males. Typically, by early flowering (week 2–3 of 12/12 indoors, or mid-late summer outdoors) male pre-flowers become apparent as small pollen sacs. Check each plant; if you spot a male, promptly and carefully remove it from the grow space. This will free up space around the remaining females. You might rearrange the pots to center remaining plants under the light after culling males. It can be prudent to veg regular seeds slightly longer than you need, anticipating that you’ll remove some males, leaving fewer but well-developed females to fill the area.
  

6. Managing Staggered Harvests and Drying

When it comes time to harvest in a staggered schedule, a bit of coordination ensures quality results and no disruptions to remaining plants:

• Harvesting One Plant at a Time: It’s perfectly fine to harvest one plant while others are still flowering. Plan to do your chopping during the plant’s dark period or just at lights-on, to minimize stress on others (you don’t want prolonged bright light during others’ dark cycle). If growing in a tent, quickly and quietly remove the target plant. Avoid excessive disturbance – for example, don’t leave the tent open too long (which could alter the environment for the remaining plants).
  
• Drying Space: Resist the temptation to hang the cut branches to dry in the same tent that’s still running for the other plants. The high humidity from hanging buds can create a microclimate that encourages mold on the plants still growing. Instead, set up a separate drying area with proper darkness, airflow, and around 50% RH for that harvested plant’s buds. If you must dry in the grow tent (due to space constraints), try to do it in a partitioned section or at a higher spot in the tent while running a dehumidifier – but this is not ideal as light and heat from the lamp can degrade terpenes. A better approach is an inexpensive drying box or spare closet.
  
• Care for Remaining Plants: After one plant is harvested, your remaining plants suddenly have more breathing room and potentially more light access. This is good – you can even spread them out or reposition lights to fill the gap. Continue your normal feeding and care schedule for these plants. Watch that humidity doesn’t spike with the change (one less plant transpiring might actually lower humidity, which is fine as flowers ripen).
  
• Staggered Flush and Finish: Each strain should be flushed (if you practice flushing) according to its timeline. For instance, you might start giving pure water to an 8-week strain at week 7, even while a 12-week strain is still getting nutrients through week 9 or 10. Keep track of these schedules separately in your calendar or grow journal. It’s helpful to tag plants or use a whiteboard to note who’s on flush and who’s still feeding.
  
• Curing in Batches: Just as harvest is staggered, curing will be too. Jar and cure each plant’s buds independently, labeling them if you identified the strain. This way you can enjoy each strain’s true character. Plus, when all is said and done, you’ll have a rolling supply of different cannabis – no need to trim everything in one exhausting session, you can spread the workload!
  

Tips for Indoor vs. Outdoor Mixed Grows

Because the question often comes up, note these differences in planning for indoor and outdoor mix pack grows:

• Indoor: You have full control of photoperiod timing and can manipulate the environment. Use that to your advantage – e.g., if one strain needs a bit more time, you can afford to give an extra week or two of 12/12. Space is usually the limiting factor indoors, so pruning and training are crucial. Also, indoor growers can consider perpetual harvest approaches (like the autos + photos method mentioned, or sequential planting of autos) to maximize yield year-round. Just ensure your ventilation and possibly carbon filter can handle plants at different maturity stages (flowering plants smell more).
  
• Outdoor: Strains will finish at different times based on their genetics and local climate. Plan your strain choices around your climate’s first frost or rainy season. If your mix pack is truly random, identify the plants early: fast-finishing indicas are likely to have dense buds and finish by early fall, whereas anything that looks very sativa (tall, long thin leaves) might go late. If you suspect a plant will need until November and you live in a temperate zone, consider a simple greenhouse or tarp setup to keep rain off and extend the season. Outdoor space planning also means tall sativas might tower over indicas – since you can’t lower the sky, consider planting tall strains in spots that won’t shade the others (e.g. north side of the plot so they don’t block sun), or use stake-and-bend techniques to lower their profile.

Growing a DNA Mix Pack can be immensely rewarding for growers who love variety. With a well-structured calendar and smart space management, you can navigate the different growth rates and harvest times like a pro. Remember to stay flexible – observe your plants and adjust the plan as needed. By anticipating staggered harvests and giving each strain what it needs, you’ll harvest a lineup of unique buds over time, rather than one big monocrop. In the end, you’ll gain experience in handling all sorts of genetics, making you a more versatile cultivator. Happy growing, and may your mixed garden deliver an abundant, high-quality harvest!

For a deeper understanding of cannabis growth stages, check out our article on the cannabis life cycle from seed to harvest.

Frequently Asked Questions (FAQ)

Q: Can I start my DNA Mix Pack seeds at different times to stagger the harvest deliberately?
A: Yes – this is essentially a perpetual harvest strategy. For example, you could germinate a few seeds, then wait 4–6 weeks and germinate a few more. This way, you’ll harvest the first batch while the second batch is midway through growth, and so on. It works best with autoflowers, since you can keep all plants under a constant 18/6 light cycle and have different aged plants side by side. With photoperiod plants in one space, staggering start times is tricky because once you flip to 12/12 for the older plants, any younger ones will be forced to flower early. To truly stagger photoperiod grows, you’d need separate grow areas (one for veg, one for bloom) to continuously cycle plants – a more advanced setup. For most home growers, it’s simpler to start all mix pack seeds at once and then harvest each as it’s ready, as described in this guide.

Q: How do I handle feeding when different strains have different nutrient needs or schedules?
A: The key is to monitor each plant and respond to its signals. In a mixed grow, one plant might show nutrient burn (dark, clawing leaves from too much nitrogen) while another in the same soil shows pale leaves (needing more food). If they share a reservoir, you’re forced into a middle-ground EC level – so consider separating them if issues arise. In soil or coco with individual feeding, you can give a bit more or less nutrients to each pot as needed. During flowering, timing of bloom boosters or flush can differ: it’s okay if one plant gets an extra week of feed while another is already flushing. Keep notes on each plant’s stage. Using organic soil or slow-release amendments can also buffer differences, as each plant takes what it needs, but adjustments are still sometimes necessary (e.g. supplemental cal-mag or bloom fertilizer for the hungry one). Always err on the side of underfeeding rather than overfeeding in a mixed garden – you can correct a deficiency faster than revive a nutrient-burned plant.

Q: Is it worth trying to keep all plants on the exact same harvest timeline?
A: Generally, no – forcing all strains to finish together could mean compromising each plant’s optimal harvest window. For instance, if you waited longer so that a late sativa and an early indica can be cut down on the same day, the indica may become overripe (more amber trichomes, possibly sedative or degraded THC). Conversely, cutting the sativa early just to align with the indica means losing potency and yield on the sativa. The beauty of a mix pack is variety, so embrace the staggered harvest. It is a bit more work to harvest and trim in phases, but your reward is higher-quality bud from each strain. If you absolutely must simplify to one harvest, you’d have to choose a middle-ground timing – not ideal. Instead, plan for individual harvests; as one plant finishes, enjoy the early smoke while the others continue to mature.

Q: How can I identify which strains I got in the mix pack as they grow?
A: Mystery mix packs don’t come with labeled strains, but you can make educated guesses. Indica-dominant plants will usually be shorter, with broad leaves and a faster bloom, whereas sativa-dominant ones are taller with thin-fingered leaves and longer bloom time. Aromas can also hint at lineage (a sweet berry smell might suggest a Blueberry or Strawberry line, fuel/skunk odor could hint at a Kush or Chemdawg lineage, etc.). If your mix pack came from DNA Genetics’ library, you could compare visible traits to their catalog descriptions. Ultimately, you might not know for sure until late in flower or even after curing when the flavor/aroma is apparent. Keep notes and photos – it’s a fun part of growing a mix to later potentially match the mystery bud to a strain name. And regardless of the name, by following a solid grow plan, you’ll end up with multiple varieties of top-quality cannabis to enjoy.