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.
#1. I've read that 30 to 45 days for seeds to mature. I went 45,seeds are drying now, when I sorted them about a third weren't viable(white,not fully formed, or cracked with slight pressure) Not sure if the auto will have an effect on maturity times. Hope this helps. Grow on,Fred.