1. Another popular medium consists of one part sand to one part potting soil. 2. Does potting soil become unusable after a couple of years? 3. It tolerates low humidity, low light, forgetful watering and any type of potting soil. 4. Mix and moisten a growing medium of one-quarter peat, one-quarter houseplant potting soil, one-quarter fine sand and one-quarter perlite. 5. Not potting soil. 6. Scatter seeds in potting soil in a flat, and cover lightly with the soil. 7. She experiments with plant hybridization and cross-pollination, and has developed her own mixture of potting soil. 8. Sow seeds indoors in potting soil six weeks before the average date of your last killing frost. 9. Some families received cement dust instead of ashes and, in at least one case, what appeared to be potting soil. 10. Sow in a well-draining, multipocket tray filled with a pre-moistened premium potting soil. |