Three Major Price Points. Once your new grass has been mowed 4 times, you can kill weeds with Ortho Weed B Gon MAX plus Crabgrass Killer OR Roundup For Lawns. Marihuana seeds normally produce roughly equal numbers of male and female offspring.  Source: <a href=http://karriere.kv-architektur.de/seed-selection-mastery-a-guide-to-cannabis-cultivation/>http://karriere.kv-architektur.de/seed-selection-mastery-a-guide-to-cannabis-cultivation/</a>