Seeds are the most cost-effective way to fill landscaping, and these particular flowers are just five bucks for a pack of 1000 seeds. Here's what to know.

Sedum (Hylotelephium spectabile) Peruvian feather grass (Jarava ichu) Redhot poker (Kniphofia species) Lavender (Lavandula species) Onosma (Onosma species) Switchgrass (Panicum species) Golden lace ...