marijuana horticulture book

Seedling Growth

Marijuana Horticulture

by Jorge Cervantes

The single root from the seed grows down and branches out, similar to the way the stem branches up and out above ground. Tiny rootlets draw in water and nutrients (chemical substances needed for life). Roots also serve to anchor the plant in the growing medium. Seedling should receive 16-18 hours of light to maintain strong healthy growth.

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