Broccoli is a heavy potassium feeder, since it requires almost double the amount of this element as compared to nitrogen.  Adjust soil pH to 6.5-6.8 to maximize yields.

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Carrot is a heavy potassium and calcium feeder. It requires 3-fold and 2-fold of these nutrients, respectively, as compared to the nitrogen rate. Potassium promotes solid, sweet carrots.

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Cauliflower grows best on a neutral or slightly acid soil (pH 6,0 to 6,5). Special attention must be paid to sufficient application of Boron, since a deficiency in this element will result in a hollow stem.

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Celery is a heavy feeder so unless the soil is extremely fertile, it normally requires the application of large quantities of nutrients. Soil pH should be maintained in the range 6.0–6.8

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Cucumber plants are high potassium and calcium requiring crops. While calcium is required at similar rates as nitrogen, potassium is required at about 80% higher rate.

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Eggplant requires high levels of potassium, and removes it at a rate ~40% higher than nitrogen. Optimum growth temperature is 21–29 °C, with preferably little temperature variation.

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Endive requires high levels of potassium; it needs potassium at 2.5-fold higher than nitrogen! Optimal soil pH is 6.5 to 6.8, and liming may be needed if the pH is lower.

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Lettuce is a heavy potassium feeder, as it requires triple the amount of this element as compared to Nitrogen. Lettuce grows best on light, well-drained fertile soils, with a pH of 6.0-7.0.

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All melon varieties are heavy potassium-feeders, as they require K at rates 2.4-fold higher than nitrogen. Melons prefer deep soils, well-supplied with organic matter and a pH around neutral.

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Parsley's optimal growth pH for mineral soil is 6.5, while for organic soil it is 5.3. On well-drained light textured soils and peat soils, higher fertilization rates are frequently used.

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Spinach has a high nutrient requirement, so soil should be deep and fertile. It has a moderate salt tolerance, and its yield-loss salinity-threshold is 3-4 dS/m.

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This crop is a heavy potassium and calcium feeder. Potassium is removed at a rate ~50% higher than nitrogen. Calcium deficiency inevitably produces "blossom-end rot" of the fruit.

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Tomato is a high potassium and calcium requiring crop. Potassium is removed at a rate ~80% higher than nitrogen. Calcium deficiency inevitably produces "blossom-end rot" of the fruit. Tomatoes are rather resistant to salinity.

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