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Optimum pH value and EC for various plants
(These values are especially important in hydroponics)

Image of hydroponic system under ASTIR LED Lights

The pH and electro-conductivity values specified here are given as a broad range. It should be noted that specific plant requirements will vary according to regional climatic conditions, and from season to season within that region. These values are intended for Hydroponic plants only (soil grown plants will differ).

PlantsPHEC
Artichoke6.5 - 7.50.8 - 1.8
Asparagus6.0 - 6.81.4 - 1.8
Basil5.5 - 6.51.0 - 1.6
Bean5.8 - 6.22.0 - 4.0
Beetroot6.0 - 6.50.8 - 5.0
Blueberry4.0 - 5.01.8 - 2.0
Vicia (fava) beans6.0 - 6.51.8 - 2.2
Broccoli6.0 - 6.82.8 - 3.5
Brussels sprouts6.3 - 6.72.5 - 3.0
Cabbage6.5 - 7.02.5 - 3.0
Pepper6.0 - 6.51.8 - 2.2
Carrots6.1 - 6.51.6 - 2.0
Cauliflower6.5 - 7.00.5 - 2.0
Celery6.3 - 6.71.8 - 2.4
Cucumber5.3 - 5.71.7 - 2.5
Eggplant5.8 - 6.22.5 - 3.5
Endive5.3 - 5.72.0 - 2.4
Garlic5.8 - 6.21.4 - 1.8
Leek6.5 - 7.01.4 - 1.8
Lemon balm (Melissa)5.5 - 6.51.0 - 1.6
Lettuce6.0 - 7.00.8 - 1.2
Marjoram5.8 - 6.21.6 - 2.0
Pumpkin5.8 - 6.21.8 - 2.4
Melon5.5 - 6.02.0 - 2.5
Okra6.3 - 6.72.0 - 2.4
Onion6.0 - 6.71.4 - 1.8
Parsley5.5 - 6.00.8 - 1.8
Pea6.0 - 7.00.8 - 1.8
Potatoes5.0 - 6.02.0 - 2.5
Squash5.5 - 7.51.8 - 2.4
Radish6.0 - 7.01.6 - 2.2
Spinach6.0 - 7.01.8 - 2.3
Chard6.0 - 7.01.8 - 2.3
Strawberries5.8 - 6.21.8 - 2.2
Corn5.8 - 6.21.6 - 2.4
Sweet Potato5.5 - 6.02.0 - 2.5
Thyme5.5 - 7.00.8 - 1.6
Tomatoes6.0 - 6.52.0 - 5.0
Watermelon5.6 - 6.01.5 - 2.4