How important is pH in growing?

Hydroponics environment with multiple plants growing that require pH measurement
Published: 17 July 2022
Agriculture

Whether you are a home gardener or manage commercial greenhouses, testing, monitoring and keeping tabs on growth parameters all help to maximise efficiency, quality and quantity.

The Groline range provides the means to continuous monitoring and testing parameters such as pH, conductivity (EC & TDS), and temperature, including hydroponic nutrient solutions.

Simple to use, Hanna makes the testing and monitoring equipment with hydroponics, aquaponics, and greenhouse growers in mind.

It is not just the nutrient feeds that need testing. Soil, fertiliser, water, and even the effluent waters will all need monitoring, as well as the finished product itself. Hanna’s range includes monitors, testers, and more complex meters for start to finish growing.

pH is so important in helping plants to flourish. We have a guide here on the ideal pH level for your chosen crop.

Optimum pH levels for plants
Vegetable plants   Optimum pH
Artichoke   6.5-7.5
Asparagus   6-8
Barley   6-7
Beans   6-7.5
Brussels Sprout   6-7.5
Corn (Maize)   6-7.5
Cucumber   5.5-7.5
Early carrot   5.5-7
Early potato   4.5-6
Egg plant   5.5-7
Late carrot   5.5-7
Late potato   4.5-6
Lettuce   6-7
Melon   5.5-6.5
Oat   6-7
Onion   6-7
Pea   6-7.5
Pepper   6-7
Pumpkin   5.5-7.5
Rice   5-6.5
Soybean   5.5-6.5
Spinach   6-7.5
Strawberry   5-7.5
String Beans   6-7.5
Sugar beet   6-7
Sunflower   6-7.5
Sweet potato   5.5-6.5
Tomato   5.5-6.5
Watermelon   5.5-6.5
Wheat   6-7
Garden and Flower Plants   Optimal pH
Acacia   6-8
Acanthus   6-7
Amaranth   6-6.5
Bougainvillea   5.5-7.5
Dahlia   6-7.5
Erica   4.5-6
Euphorbia   6-7
Fuchsia   5.5-7.5
Gentian   5-7.5
Gladiolus   6-7
Hellebore   6-7.5
Hyacinth   6.5-7.5
Iris   5-6.5
Juniper   5-6.5
Ligustrum   5-7.5
Magnolia   5-6
Narcissus   6-8.5
Oleander   6-7.5
Paulownia   6-8
Primula   6-7.5
Rhododendron   4.5-6
Roses   5.5-7
Sedum   6-7.5
Sunflower   6-7
Tulip   6-7
Viola   5.5-6.5
Orchard Plants   Optimal pH
Apple   5-6.5
Apricot   6-7
Cherry   6-7.5
Grapefruit   6-7.5
Grapevine   6-7
Lemon   6-7
Nectarine   6-7.5
Orange   5-7
Peach   6-7.5
Pear   6-7.5
Plum   6-7.5
Pomegranate   5.5-6.5
Walnut   6-8
Agriculture
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