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.
Arnica montana. Direct sow seed as soon as it is ripe in the fall. Sow stored seed in early spring in cold frame, or cold moist stratify for 2-4 weeks before starting indoors 4-6 weeks before last frost. If it does not germinate in at 65-75ËF in 3-4 weeks, return to cool stratification for 2 weeks.