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Clone Humidity, Warmth, and Mothers

Clone humidity, heat, and a reliable mother keep restarting simple. Domes, mats, and modest light replace a full veg room until roots exist.

cloning humidity
Clone Humidity, Warmth, and Mothers — Marijuana Grower's Handbook, page 699
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Humidity for new cuts

First week

Keep dome humidity around 70 to 80 percent, ideally in the mid 70s to mid 80s

Why so high

Cuttings have no roots, so dry air wilts them before they can drink

Water and aero

Starts in water or a cloner can sit at 50 to 60 percent humidity because the stem is already wet

Room scale

A closet often needs a humidifier or fine misters plus a humidistat to hold the band

Warmth and light

Root heat

80 to 85 F (27 to 29 C) in air and medium is the fast-rooting range. Cooler rooms just slow down

Heat mats

A mat or heated tray with a tall dome holds a small batch without heating the whole room

Early light

Two T-8s or one HO T-5 over a four-foot rack is enough until roots appear

After roots

Double the light, often with two T-5 HO tubes, once the plants can use it

Working with a mother

Donor plant

The mother is the plant you keep in veg so every clone matches a known keeper

Tip versus internode

Tips make stronger plants. Internode starts make more copies from the same mother

Veg time

Larger clones need less veg after rooting. Smaller clones pack more starts into one tray

Your method

If your routine roots cleanly, it is the right method for that mother

Without a large mother room

Tissue option

Micropropagation grows many tiny copies on sterile gel and can replace a row of mother plants

Mother jars

A multiplying jar acts like a mother that does not fill a veg tent

After deflask

Treat tissue-culture plants like ordinary clones under a dome until a cuticle forms

Sterile handling

Alcohol, a pressure cooker, and a clean tote matter more than a formal lab