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HYDROPONICS

Nutrient Levels

Hydroponic gardeners all over the world monitor nutrient levels in roughly the same way—by measuring total dissolved solids in the growing solution — but they have different preferences for the format of their test results. Growers in the U.S. often examine a simple ratio known as parts per million PPM). High concentrations of salts increase the solution’s electrical conductivity (EC).

Total dissolved solids readings help to indicate the density of solution which can help to determine when it’s time to add nutrients. Temperature can affect TDS/EC meter readings. It is important that you read your hydroponics nutrient packaging carefully to make sure feeding indications correspond with your meter.

Information below provided by Sunleaves.

Suggested PPM Levels

For great results, consult the ppm table below for assorted fruits, veggies, herbs and tropicals. Keeping your nutrient solution at the right concentration is important for maintaining optimum growth!

Species TDS Range Species TDS Range
African Violets 840-1050 Ficus 1120-1680
Artichoke 560-1260        Garlic 980-1260
Asparagus 980-1260 Gladiolus 1400-1680
Aster 1260-1680 Impatiens 1260-1400
Bananas 1260-1540 Lavender 700-980
Basil 700-1120 Leek 980-1260
Beans 1400-2800 Lettuce 560-840
Blueberries 1260-1400 Mint 1400-1680
Broccoli 1960-2450 Okra 1400-1680
Cabbage 1750-2100 Palms 1120-1400
Carnation 1260-2450 Parsley 560-1260
Carrots 1120-1400 Peas 980-1260
Cauliflower 1050-1400 Rosemary 700-1120
Celery 1260-1680 Sage 700-1120
Chives 1260-1540 Spinach 1260-1610
Cucumber 1190-1750 Strawberries 1260-1540
Eggplant 1750-2450 Thyme 560-1120
Endive 1400-1680 Tomatoes 1400-3500
Ferns 1120-1400 Zucchini 1260-1680

 

 

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