| As your sweet peas begin to grow, sprinkle a little superphosphate over the bed and water well in. |
| To give your Agapanthus a boost, sprinkle a handful of superphosphate around each clump in early spring. |
| Plant from mid-October through November in a loose, fertile soil enriched with bone meal or superphosphate. |
| Mined rock phosphate may be used but its manufactured derivative superphosphate may not. |
| Add about one-half pound of superphosphate to each bushel of organic material applied to the soil. |
| Work some superphosphate into the soil about a foot from the base of the plant. |
