Recipes for tomato and other fruiting crops
Below: Tomatoes soon after transplanting on rockwool slabs, still in the vegetative phase.
Right: Tomatoes in the mature fruiting stage.
Fruiting crops tend to have higher nutrient demands than leafy greens. Besides simply bumping up the nitrogen, it’s important to increase the potassium, calcium and magnesium as well. A single fertilizer recipe has worked well for growing tomatoes, cucumbers and peppers at the University of Arizona Controlled Agriculture Center greenhouse (Table 4). A similar recipe following the twobag approach and a nutrient comparison is noted in Tables 4 and 5.
For tomatoes, commercial operations often adjust the nutrient solution recipe according to the crop growth stage. The strategy is typically to supply more nitrogen, calcium and magnesium at first to promote good plant structure and vegetative growth (Table 6). Then about six weeks after transplanting the tomato seedling,nitrogen is reduced,but potassium is increased, to promote the transition between vegetative growth and flowering and fruit set. Finally, the recipe may be adjusted again to balance vegetative and reproductive growth as the plant continues to grow and set fruit.
Recipes for tomato and other fruiting cropsBelow: Tomatoes soon after transplanting on rockwool slabs, still in the vegetative phase. Right: Tomatoes in the mature fruiting stage.Fruiting crops tend to have higher nutrient demands than leafy greens. Besides simply bumping up the nitrogen, it’s important to increase the potassium, calcium and magnesium as well. A single fertilizer recipe has worked well for growing tomatoes, cucumbers and peppers at the University of Arizona Controlled Agriculture Center greenhouse (Table 4). A similar recipe following the twobag approach and a nutrient comparison is noted in Tables 4 and 5. For tomatoes, commercial operations often adjust the nutrient solution recipe according to the crop growth stage. The strategy is typically to supply more nitrogen, calcium and magnesium at first to promote good plant structure and vegetative growth (Table 6). Then about six weeks after transplanting the tomato seedling,nitrogen is reduced,but potassium is increased, to promote the transition between vegetative growth and flowering and fruit set. Finally, the recipe may be adjusted again to balance vegetative and reproductive growth as the plant continues to grow and set fruit.
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