The Seven Days That Make or Break Your Grow
You've picked up your clones. They look healthy — good color, visible roots, upright posture. You transplant them into soil or coco, water them in, and... a week later, two of eight are wilted, one has yellowing leaves, and only five look like they're actually growing. Sound familiar?
Clone transplant failure is almost never about the clone. It's about the first seven days. Get those right and your survival rate should be 95% or higher. Miss a single variable — humidity, light intensity, watering rhythm — and you'll lose plants you paid good money for.
This guide covers the exact protocol Clone Source recommends to our customers, from the moment you unbox your clones through the end of week one.
Day 0: Unboxing and Acclimation
Your clones just spent 24-48 hours in a dark box. They're stressed. Don't transplant immediately.
Open the box and remove any packaging material. Place the clones in your grow space under low-intensity light — 100-150 PPFD, or roughly 20-24 inches below a 100W LED at 25% power. Let them sit for 2-4 hours. This gives them time to recover from shipping stress and adjust to your environment's temperature and humidity.
During acclimation, mist the clones lightly with plain pH-adjusted water (6.0-6.5 for soil, 5.8-6.2 for coco). Do not add nutrients to the misting water. The clones don't need food yet — they need hydration and humidity.
Day 1: Transplant
After acclimation, transplant into your chosen medium. Here are the specifics for each medium type.
Soil: Use a light, well-aerated potting mix — not hot super soil. Clones have delicate root systems that burn easily in nutrient-rich media. Fox Farm Happy Frog or a similar light mix works well. Water the medium before transplanting so it's moist but not saturated. Make a hole slightly larger than the clone's root plug, insert the clone, and gently firm the soil around the stem. Water in with 100-200ml of pH-adjusted water — enough to settle the soil around the roots, not enough to cause runoff.
Coco Coir: Pre-buffer your coco with calmag before transplant. Coco naturally binds calcium and magnesium, and a fresh clone in unbuffered coco will show deficiency within days. After buffering, transplant as with soil, but water in with a very light nutrient solution — EC 0.4-0.6, pH 5.8-6.0. Coco is inert and provides no nutrients, so a light feed is necessary from day one.
Day 2-3: The Humidity Dome Period
This is the most critical 48 hours. Clones have small root systems that can't take up water fast enough to replace what the leaves lose through transpiration. A humidity dome — or any clear enclosure that traps moisture — keeps the air around the leaves at 70-80% RH, reducing transpiration stress while the roots establish.
Keep the dome on for the first 48 hours, but open the vents or crack the dome for 15-30 minutes twice daily to exchange air. Stagnant, 100% humidity air breeds fungal issues. The goal is high humidity with air movement.
Light during the dome period: 150-200 PPFD, 18 hours on / 6 hours off. Higher light drives photosynthesis and transpiration, which you want to minimize until the roots establish. The clones don't need intense light right now — they need root development.
Temperature: 72-78°F (22-26°C). Cooler slows root growth; hotter increases transpiration faster than the roots can replace.
Day 4-5: Hardening Off
This is where most growers lose clones. They go from dome to open air in one step, and the clones wilt within hours from the sudden drop in humidity.
Hardening off should be gradual — remove the dome for 1-2 hours on day 4, then replace it. Remove for 3-4 hours on day 5, then replace. By the end of day 5, the clones should be able to handle ambient humidity (40-60% RH) without drooping. If they wilt, replace the dome and try again the next day.
First watering after transplant: By day 4, the medium should be drying out. Water lightly — 200-300ml — when the top inch of soil or coco feels dry. Do not saturate the pot. Overwatering at this stage is the single most common cause of clone death. Small roots need oxygen more than they need water.
Day 6-7: First Feed and Light Increase
By day 6, the clone should be standing upright in open air with no wilting. New growth should be visible at the top node — tiny bright green leaves emerging. This is the signal that roots have established and the plant is ready for its first real feed.
Soil: Apply a half-strength vegetative nutrient solution. If your nutrient line recommends 5ml/gallon, use 2.5ml/gallon. Water to slight runoff (10-20%).
Coco: Increase to EC 0.8-1.0. Water to 20% runoff daily from this point forward. Coco should never dry out completely.
Light intensity can now increase to 250-350 PPFD. If using LED, this typically means 18-20 inches at 50-75% power, but measure with a PAR meter if possible.
Signs Your Transplant Is Going Well
Day 3-4: Leaves remain upright and turgid. No yellowing of lower leaves. New root tips visible at drainage holes (if container allows).
Day 5-7: Visible new growth at the top node. Slight upward leaf angle (praying) during lights-on. No wilting when the dome is removed. Medium drying at a normal rate (needs water every 2-4 days).
Signs of Trouble — And How to Fix It
Wilting after dome removal: Replace the dome immediately. The clone wasn't ready. Increase dome-off intervals more gradually — try 30 minutes, then 1 hour, then 2 hours over 4-5 days.
Yellowing lower leaves: The clone is cannibalizing its lower leaves for nutrients. Apply a very light vegetative feed (EC 0.4-0.6) even if you're still in the dome period.
Purple stems or petioles: Phosphorus deficiency or temperature stress. Check that nighttime temps aren't dropping below 65°F. If temps are fine, add a light bloom nutrient (higher P) to the next watering.
Damping off (stem rot at soil line): Too much water, not enough air movement. Reduce watering frequency, increase air circulation with a small fan (not directly on the clones), and consider applying a beneficial bacteria product like Great White or Hydroguard to outcompete the pathogens.
FAQ: Clone Transplant
Q: Can I transplant directly into the final pot?
A: For smaller plants (autos or space-limited grows), yes. For photoperiod plants you plan to veg for 4+ weeks, an intermediate 1-gallon pot allows better root ball development before the final transplant.
Q: What's the ideal pot size for a clone's first home?
A: 1-gallon or 4-inch square pot for the first 2-3 weeks. This allows the root ball to develop densely before moving to the final container. Going straight into a 5-gallon pot with a small clone often leads to overwatering and slow growth.
Q: Should I use rooting hormone when transplanting rooted clones?
A: No — the clone is already rooted. Rooting hormone is for cuttings, not established clones. Applying it to existing roots can actually damage them.
Q: How long until I can start training (topping, LST)?
A: Wait until the clone has developed 2-3 new nodes beyond the original growth — typically 10-14 days after transplant. Training too early stresses a plant that's still establishing.
Conclusion
The first seven days after transplant determine whether your clones thrive or struggle. Control humidity through gradual hardening off, keep light intensity low until roots establish, water sparingly, and don't feed until you see new growth. Execute these basics consistently and your survival rate will be 95% or higher — every time. Order your next round of clones at clone-source.com/clones.
