When to Transplant Cannabis Seedlings (and How to Avoid Shock)
Transplant too early and the roots cannot use the extra soil, which stays wet and invites root rot. Transplant too late and the plant is root-bound and stalls. The signals are easy to read.
Signs it is time
White roots visible at the drainage holes, growth that suddenly slows without another explanation, or a plant that dries its pot out in under two days. Any of those means the roots have run out of room.
Pot size progression
Solo cup or starter plug, then a 1-2 gallon, then the final 5 gallon fabric pot. You can go straight from a solo cup to a 5 gallon if you water only a small zone around the plant at first, but stepping up is more forgiving.
The no-shock method
Water the day before, not the hour before — slightly damp soil holds together but is not heavy. Pre-moisten the new pot's soil. Support the stem between two fingers, invert, and let the root ball slide out. Do not tease the roots apart.
Set it at the same depth, backfill, and water lightly around the edges to pull roots outward. Keep the light dimmed for 24 hours afterward.
Frequently asked questions
- Should I transplant autoflowers?
- Ideally not. Autos are on a fixed clock and any stall costs yield, so plant them directly into their final pot.
- How long does transplant shock last?
- With a clean transplant, hours. With torn roots or bone-dry soil, several days of droop and stalled growth.
Keep reading
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