Rooting Timeline
How Long Do Cannabis Clones Take to Root?
Cannabis clones take 7 to 14 days to root under the right conditions - a humidity dome, gentle light, and 70 to 80 percent humidity. Fast-rooting strains show white roots in about 5 days, while slow or stubborn cuts can take up to three weeks.
Humidity, temperature, and light drive the timeline. Keep cuttings under a dome at 70 to 80 percent humidity with a root-zone temperature near 72 to 78°F. Gentle light around 200 PPFD is plenty; intense light stresses an unrooted cutting, the same way it does when you care for clones upon arrival.
A clone you buy online has already cleared this stage. Nurseries root and harden each plant before it ships, which is why a delivered clone is ready to grow in days - see how cannabis clone shipping services work.
Watch for new top growth, which usually signals roots have formed. Don't tug the stem to "check" - that snaps fragile new roots and sets the plant back.
If a cutting hasn't rooted in three weeks, it likely won't. The usual culprits are low humidity, cold media, overwatering, or a cutting taken from an unhealthy mother.
Skip the rooting wait with pre-rooted clones.
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