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.
Very easy-to-grow by direct seed in full sun. Planted from early spring to early summer and again from late summer through fall. Arugula is very fast-growing, quick to bolt in warm weather, and if allowed to flower, will readily self-seed. Succession plantings every 2-3 weeks are recommended for a continual harvest. Harvest above growth point for cut-and-come-again production. Plant Seeds: 1/8 deep with 1-2 between seeds.