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.
For a summer harvest, sow seeds two to three weeks before the last spring frost. For a fall harvest, direct sow seeds outdoors 85 to 100 days before the first fall frost. Alternately, start your seeds indoors. If you choose to start your seeds indoors, plant them in peat pots or other small seedling pots.