Chemical Weathering. Chemical weathering takes place in almost all types of rocks. Smaller rocks are more susceptible, however, because they have a greater amount of surface area. Chemical reactions break down the bonds holding the rocks together, causing them to fall apart, forming smaller and smaller pieces.
Autos generally are ready to harvest sooner than photoperiod. Most autos are ready to harvest 65-90 days after being sprouted from seed. Some super autos have been bred to grow very big and can take up to 100 days before harvest.
Iâm germinating a plug flat right now. The first seeds germinated in 7 days. At 21 days seeds are still coming up. It can take as long as 6 weeks or more for all of the seeds to come up. The minimum germination standard is 60%. Most varieties will germinate at 80+% and higher. I prechill the seeds in a refrigerator prior to shipping. Itâs best to store them in a refrigerator if there will be a delay in sowing. They should be frozen for 3-4 weeks as mentioned above before seeding.