Growing Bell Peppers With Grow Lights

The crunch and flavor of a fresh-from-the-plant pepper is a special thing.
Peppers can grow very well indoors with the right grow lights.

Bell Peppers Light Requirements

Peppers are light hungry but you can grow them under a less powerful grow light by bumping up the hours of light. They’re happy with as many as 20 hours of light and just 4 hours of darkness.

Bell Pepper 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 Bell Peppers

Peppers are light hungry but you can grow them under a less powerful grow light by bumping up the hours of light. They’re happy with as many as 20 hours of light and just 4 hours of darkness.

Bell Pepper plants do best with a lights on for:

14

20

 hours 

Best Grow Lights for Bell Peppers

16 hours of light is a pretty good target for peppers — particularly if they’re in your living space and you like to sleep.

You’ll need a fairly powerful light to provide 20-30 DLI in a 16 hour period. The Bright Grow recommendation is the GE 24″ LED Fruit & Flower Fixture. Hang the light just three or four inches above your leaves — raising it to stay just at that distance as the plant grows. This will give an optimal amount of light directly under the footprint of the lamp.
Bell Peppers, 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 Bell Peppers. High output fluorescent bulbs can work too but they generally provide less of the important red wavelengths.

Temperature for Bell Peppers

Sweet peppers germinate best in warm soil — use a heat mat and aim for 80°F. After germination pepper plants prefer consistent warmth.

Germination: 

80

°F 

Growth: 

65

 – 

80

°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 Bell Pepper Plants

Some varieties of peppers can grow quite tall. More compact varieties — around 1 to 2ft — do best for indoor growing.
Typically grows 12

36

” tall

Does well in 10

12

” diameter containers

Bell Pepper Varieties

  • Hungarian Cheese Peppers
  • Red Candy Cane

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