Natural tomato fertilization: how to prepare an effective mixture and grow a bountiful harvest

Gardener Janina offers a comprehensive guide to naturally fertilizing tomato plants, emphasizing the importance of providing the right nutrients at the right time for optimal growth and yield. She explains that tomatoes require nitrogen for leaf and stem development, phosphorus for root strength and flowering, and potassium for fruit formation, taste, and overall yield.

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You just need to know what, when, and how much. Nitrogen promotes leaf and stem growth, phosphorus is important for strong root formation and flowering, and potassium helps plants form fruits, improves their taste, and increases yield. Calcium protects against fruit blossom end rot, and magnesium, iron, and boron are also helpful.

Janina's approach begins at planting. She advises adding a mix of well-rotted compost, biohumus, wood ash, and crushed eggshells to each planting hole. "Compost and biohumus provide nutrients over a longer period, ash supplies potassium and calcium, and eggshells gradually release additional calcium," she notes. This initial feeding supports the young plants as they establish.

Approximately two weeks after planting, as tomatoes enter a phase of active growth, Janina recommends a nitrogen boost using a fermented nettle solution. She prepares this by soaking a kilogram of fresh nettles in 10 liters of water for one to two weeks, stirring daily. The resulting liquid is diluted at a 1:10 ratio and applied at a rate of half to one liter per plant every ten days. "Nettle infusion accelerates growth and strengthens resistance," she explains.

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Compost and biohumus provide nutrients over a longer period, ash supplies potassium and calcium, and eggshells gradually release additional calcium.

As the plants begin to flower and set fruit, Janina shifts the focus to potassium. She prepares a wood ash extract by mixing one glass of ash with 10 liters of water and letting it steep for 24 hours before straining. This solution is applied similarly to the nettle infusion, promoting better fruit development and taste. She also suggests using compost tea, made by steeping compost in water, diluted and applied to nourish the plants throughout the season.

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Nettle infusion accelerates growth and strengthens resistance.

To combat blossom end rot, a common issue often linked to calcium deficiency or inconsistent watering, Janina suggests an eggshell infusion. She crushes 10-15 eggshells, soaks them in a liter of vinegar for about a week, then dilutes 100 ml of this concentrate in 10 liters of water. This is applied every two to three weeks. Janina's core advice is to avoid over-fertilizing and to apply treatments timely, as excessive nettle infusion after flowering, for example, could promote leaf growth at the expense of fruit development.

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This fertilizer helps form a more abundant harvest and improves the taste of tomatoes. Compost tea nourishes tomatoes with nutrients, keeping them strong throughout the season.