In Utah, there are two times a year when overseeding is most successful: spring and late summer fall. Late summer fall is best because the seedlings can establish adequate root systems for the following Sempervivum Hybridum (Hen & Chicks Cactus Mixed) Succulent Seeds 1,000 Seeds Per Pack Rare Philodendron Billietiae Etsy 40,543 Succulent Sketch Royalty Free Images, Stock Photos & Pictures Shutterstock