By our calculations, you should look at sowing California wonder 300 tmr about 60 days before your last frost date.
Start seed indoors 8 weeks before planting outdoors. Transplant when 3 inches tall. Or, sow directly in garden in sunny location after frost danger is past. Thin to 1 plant every 18 inches when 3 inches tall. Use a balanced fertilizer to increase production.
As California wonder 300 tmr is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.Cal wonder 300, California wonder 300