Vegetable Seed Viability: How Long Do Seeds Last? The Old Farmer's Almanac WARNING ZZ plants, along with many other houseplants, are toxic to cats. Mine are both trained not to eat the plants, so I chose to keep them, but if you have a Terra Cotta Clay Pots How to Grow Perennials from Seed. Mike's Backyard Nursery The succulents of Madagascar Sansevieria robusta white variegated repotted with fresh soil