Greenhouse

Fertilisation and root development for greenhouse tomatoes

The most sensitive moment for a tomato is establishment after planting out, when the root system takes over from the plant's own reserves. If that handover stalls, the plant stops. At fruit set the requirement changes: the plant should ripen fruit rather than build more foliage, and the dose comes down.

Dosage by stage

Before planting

Soil pre-treatmentReduced 2026

Strength 3 %Mix: 3 dl Allgrow + 10 L waterWatering: At least 2 L solution/m²Frequency: Once

Water or spray the soil at least 24 hours before planting out. Gives faster establishment and less stress afterwards.

Vegetative growth

Growing plantsReduced 2026

Strength 2,5 %Mix: 2.5 dl Allgrow + 10 L waterWatering: At least 2 L solution/m²Frequency: Twice weekly

Spray the whole plant and the soil. Gives stronger foliage and a stronger root system.

Fruit set

Once fruit appears

Strength 2,5 %Mix: 2.5 dl Allgrow + 10 L waterWatering: At least 2 L solution/m²Frequency: Once weekly

Halved frequency from fruit set onwards. Gives more even fruit set and steadier growth.

Drip irrigation

Via stock solution

Mix: 10 L Allgrow per 1,000 m²Method: In the stock solutionFrequency: 2 days per week

Dosed over two days through the stock solution or separate vessels connected to it.

Machine application

MethodMixtureNote
Foliar spray2 %150–200 L water per 1,000 m²
Cold fogging5 L Allgrow + 20 L water per 1,000 m²Container concentration, not plant contact

Effect

  • Stronger, healthier plants
  • Better flowering and fruit set
  • More even and larger fruit
  • Stronger root system
  • Less stress in heat and drought

Trials on this crop

Tomat – kumulativ skörd över två säsonger

kg/kvm

Tomat – dos-respons på fruktmognad

Mogen frukt/planta

What next?

To all crops