How much watering should I be supplying milkweed seeds?
If the package says 2-4 weeks before the last frost should I sow the seeds at the end of February for Cottonwood, AZ?
Below is a link to an article discussing how to start seeds for the garden which applies to flowering plants and vegetables as well. 90% of the time, the last frost date for the Cottonwood area is March 24th with the earliest last frost date of March 18th. Starting the seeds in early February and taking into consideration the time required to "harden off" the young plants, your plants should be ready to transplant the beginning of March.