Growing Cucumber With Grow Lights

A fresh-from-the vine cucumber is a fantastic addition to a salad or garnish.
Cucumbers can grow well under lights. Their larger size and light demands mean they’re probably not a first-timer crop though.

Cucumber Light Requirements

Cucumber plants will thrive under lights that provide:

20

30

 DLI 

DLI (Daily Light Integral) is how we measure amounts of “plant-useful” light. Once we know a plant’s DLI needs we can match it to the ideal grow light setup.

Day Length for Cucumber

Cucumber plants do best with a lights on for:

12

18

 hours 

Best Grow Lights for Cucumber

Cucumber, like all fruiting plants, will grow best under a light that's heavy on the red parts of the spectrum. A "fruit and flower" LED grow light is a good choice for growing Cucumber. High output fluorescent bulbs can work too but they generally provide less of the important red wavelengths.

Temperature for Cucumber

Cucumbers can handle warmer daytime temperatures as long as they get some cooler hours overnight.

Germination: 

60

 – 

85

°F 

Growth: 

70

 – 

75

°F 

Many plants germinate at lower temperatures and prefer more warmth for their growth. This is how plants have evolved — sprouting early in the spring when the days are cool and growing and producing as the days get longer and warmer.

Size of Cucumber Plants

Cucumbers needs at least a foot of soil depth — so select a good deep container.
Typically grows 36

60

” tall

Does well in 8

12

” diameter containers

Cucumber Varieties

Select bush varieties which will remain manageable — unlike some of the large vining varieties.
  • Picolino
  • Early Fortune
  • Spacemaster

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