How To Grow Hydroponic Cucumber

Generally Grown In

Dutch bucket

Perlite bags

Growing Medium

Rockwool cubes on Rockwool slabs

Trough systems

Seed Germination

Seeds germinate in 2 to 3 days

28° is the best temp. for germination, for seedling 25° is best

Avoid water and nutrient stress during seedling growth

Temperature Required

Best temperature 26.6 – 29.4°C (50 to 55°F)

Make sure air movement is good

Cucumber can withstand vary in temp. but within 30°C (56°F)

The nutrient solution temperature should not exceed 22°C (71.6°F)

Spacing Recommended for Cucumber Foliage Growth

Space between rows should be 4 to 5 ft (1.2 to 1.5 m) with plants spaced 12 to 18 in. (30 to 45 cm) in the row

Maintain proper plant density, as high plant density can lower yield, size and is prone to disease infestation

Pruning of Cucumber Foliage

The cucumber plant can be trained to a support wire in four different configurations – canopy, vertical cordon, inclined cordon (V-cordon, V-training), and guernsey

V-cordon system of training European cucumbers

Umbrella pruning of cucumber

Pruning of cucumber foliage

Remove all the suckers that form between the leaves and stem on the main stem until the last few near the supporting cable as mentioned earlier, just pull them off by hand

The first seven to eight fruit should also be removed so that the plant can become vigorous enabling it to yield heavily later

Pruning of Cucumber Foliage

Be careful not to bend the growing tip of the plant too sharply as they can easily break

Cucumber suckers (side shoots) must be removed for training

1-inch long need to be removed from the plant up to 7 leaf axils to promote initial vegetative growth

Cucumber tendrils must be removed daily the suckers on the laterals will not grow when the fruit is forming

Foliage Care

Dead, diseased, or insect-damaged foliage should be removed as soon as identified

If your fruit load is too heavy, plant vigor is reduced, and maturing fruit may be stunted

Unmarketable fruit should be identified early and removed

The curvature of the fruit, known as “crooking,” can occur early in the fruit development stage, and such fruit should be removed from the Foliage

Foliage Care

Cucumber tastes bitter when the cucumber plant is under stress, similar to that causing crooking

Increasing too much EC can result in slow plant growth and poor fruit set


Cucumbers are all female without any male flowers. For that reason, they do not form seeds. We, in fact, do not want any pollination of the female flowers or seed would form

Fruit Yield

Fruit yields can vary from a low of 2 fruits per plant per week to a high of 8 depending on light conditions

Fruit Harvest

20 to 40 fruit can be harvested per plant

Mature fruit will be ready for harvest normally within 2 weeks after your fruit is set

Post Harvest

The fruit must be shrink-wrapped in order to maintain its turgidity due to its thin skin fruit can lose water and get shrink

The fruit is best stored at 10 – 13°C (50 – 55°F) at 90 to 95% relative humidity with a shelf life from 10 to 14 days

Also Read: Nutrient Required for Hydroponic Cucumber

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