Save those peels and shells!
- Banana peels contain potassium - which helps tomatoes resist disease and pests, help fruit to develop, and just generally strengthen your tomato plants. The phosphorus in the peels promotes more blossoms and hence - more tomatoes! The calcium helps roots to develop.
- Eggshells keep the soil a bit acidic and help prevent blossom-end rot.
To make the fertilizer -