Indoor growers usually transplant into larger pots or soil beds for 1-4 weeks of vegetative growth before transitioning to flower. A seed is a plant that s waiting for the right conditions to germinate and grow. For example, winter annuals like field horsetail and shepherd s purse germinate before any GDD accumulate in the spring; giant ragweed and common lambsquarters require fewer than 150 GDD and therefore emerge several weeks before corn planting; redroot pigweed, giant foxtail, and velvetleaf germinate at 150 300 GDD, close to corn planting time; whereas large crabgrass and fall panicum require over 350 GDD and usually emerge after the corn is up.  Source: [url=http://www.spielbyweb.com/forum/viewtopic.php?t=6760]http://www.spielbyweb.com/forum/viewtopic.php?t=6760[/url]