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Move your clone into its next container the moment you see white, healthy roots reaching out from the bottom of the rooting medium — usually 7 to 14 days after a fresh cutting takes, or as soon as it arrives if you ordered already-rooted stock. Waiting longer means the clone becomes root-bound and growth stalls. Going too early means the larger pot stays too wet for the underdeveloped roots to manage.

Yes — and the new clone will be a perfect genetic match for its parent. Cannabis growers have been propagating clones from clones for decades without any inherent problem. The actual concerns are pathogen accumulation over many generations (especially Hop Latent Viroid) and contamination from tools or unverified sources, not the act of recloning itself.

Fresh clones root best at 75 to 80 degrees Fahrenheit and 65 to 75 percent relative humidity. Once the roots are established and visible, both numbers come down toward standard vegetative ranges — 72 to 78 degrees and 50 to 60 percent humidity. Most clone failures come from getting one of these two wrong, especially overnight drops when the lights go off.

Look at root development and new growth, not physical size. A four-inch clone with strong white roots and fresh new leaves is more ready to transplant than a six-inch clone whose roots haven't broken through yet. Above-ground height is constrained by the root system underneath — so the roots are what actually matter.

Open the shipping box right away, but do it in low light — a clone that has been dark for two or three days in transit will burn under sudden direct sun or full-intensity grow light. Check the leaves, stem, and roots for damage. Water the rooting medium lightly with pH-adjusted plain water. Place the clone under low-intensity light for 24 to 48 hours. Skip nutrients and skip transplanting on day one — let it acclimate first.

Cannabis clones need low-intensity light — about 100 to 200 PPFD — during the first 7 to 14 days while they're rooting. Once roots are established and you've transplanted, ramp up to 300 to 500 PPFD for normal vegetative growth. Light schedule throughout the clone and vegetative phase should be 18 hours on, 6 hours off. Too much light during rooting is one of the most common causes of clone failure.