Marijuana Grow Basics book

Marijuana Grow Basics

by Jorge Cervantes

Seeds and Germination

A seed contains all the genetic characteristics of a plant. Seeds are the result of sexual propagation and contain genes from each parent, male and female. Some plants, known as hermaphrodites, bear both male and female flowers on the same plant. The genes within a seed dictate a plant’s size; disease and pest resistance; root, stem, leaf, and flower production; cannabinoid levels; and many other traits. The genetic makeup of a seed is the single most important factor dictating how well a pant will grow under artificial light or natural sunlight and the levels of cannabinoids it will produce.

Weak plants are the result of weak seeds and poor growing conditions. Strong, healthy parents and proper care yield strong seeds that germinate well. Strong seeds produce healthy plants and heavy harvests. Seeds stored too long will germinate slowly and have a high rate of failure. Vigorous seeds initiate growth within seven days or sooner. Seeds that take longer than a month to germinate could always be slow and produce less.

People grow seeds rather than clones because of “hybrid vigor”, a phenomenon that causes F1 seeds that are the product of two true-breeding parents to grow about 25 percent stronger and bigger.

Typically, a grower who acquires 5-15 quality seeds from a reputable seed company germinates them all at once. Once germinated, the seeds are carefully planted and grown to adulthood. Normally some of the seeds will be male, some will grow slowly, and two or three seeds will grow into strong “super” females. Of these super females, one will be more robust and potent. Select this super female to be the clone mother.

Mature seeds that are hard, beige t dark brown, and spotted or mottled have the highest germination rate. Soft, pale, or green seeds are usually immature and should be avoided. Immature seeds germinate poorly and often produce sickly plants. Fresh, dry, mature seeds less than a year old sprout quickly and grow robust plants.

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