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1) Use any potting soil to propagate tuberosa. 2)Put seeds in damp sand in the refrigerator for1month 3) sprinkle soil over seed in 20-4" pot container flats. Do not bury seeds. 4) in full sun keep damp and seeds should germinate in a week or two. 5) pinch off top set of leaves when at least 2 sets of primary leaves have grown 6) let grow for 4-8 weeks in 4" pots 7) Plant in ground in 1 gallon hole leveling plant with ground level and press air out compacting soil anytime of the year 8) water occasionally until you see new growth and when there hasn't been rain for 1 month thereafter. http://www.wildflower.org/plants/result.php?id_plant=ASTU