Grow Light for Chili Plants Indoors That Set Fruit
A grow light for chili plants indoors gives hot peppers the bright overhead light they need to flower plus set fruit. University of Minnesota Extension notes that without bright light directly overhead, pepper stems stretch plus lean. Grow plants in a warm room, hang the lamp close plus gently shake open flowers to move pollen.
The short answer
Chili plants need bright overhead light plus warmth indoors. Iowa State University Extension advises a grow light set up per its package directions for 14 hours a day, or an LED shop fixture 18 inches from the foliage. University of Minnesota Extension notes a soil temperature of 70F is ideal for peppers.
How much light do chili plants need to fruit?
Iowa State University Extension notes vegetables require very high light levels. It advises 12 to 14 hours of light for most species, within a range of 10 to 16 hours. Some species need the dark period to flower plus fruit, so run the lamp on a timer.
| Setting | Guideline | Source |
|---|---|---|
| Grow light hours | 14 hours | Iowa State University Extension |
| LED shop fixture distance | 18 inches | Iowa State University Extension |
| T5 fluorescent distance | 9 inches | Iowa State University Extension |
| Ideal soil temperature | 70F | University of Minnesota Extension |
| Bring plants in when nights drop below | 55F | University of Minnesota Extension |
Source: Iowa State University Extension plus University of Minnesota Extension.
How warm should indoor chili plants be?
University of Minnesota Extension notes a soil temperature of 70F is ideal plus warm soil suits peppers better than cool. It advises bringing young plants indoors if night temperatures drop below 55F. It also notes smaller fruited peppers tolerate both cool plus hot temperatures better, which suits many chili types in pots.
How are pepper flowers pollinated indoors?
NC State Extension notes small white to purple flowers form on pepper plants. With no bees or breezes indoors, gently tap or shake open flowers to move pollen. University of Minnesota Extension notes too much nitrogen gives bushy leafy plants that are slow to bear fruit, so feed lightly.
How to: step by step
- Pot the chili plant in a container with drainage.
- Place it in a bright warm room.
- Hang the grow light per its package directions above the canopy.
- Run the light on a timer for 14 hours a day.
- Tap or shake open flowers to move pollen.
- Feed lightly plus water when the top inch is dry.
Troubleshooting
Flowers drop without fruit: poor pollination or a cold room. Warm the room plus shake the flowers.
Tall stretched plants: low light. Lower the lamp.
Aphids on new growth: indoor pests. Rinse the leaves plus look often.
For more on lighting see grow lights for cannabis, led light distance cannabis, grow light sizing per square foot plus cannabis seeds. Kind Seed Co also stocks seeds for indoor growers.
Sources
- Capsicum annuum (pepper), NC State Extension Gardener Plant Toolbox
- Growing peppers, University of Minnesota Extension
- How to set up supplemental lights for indoor plants, Iowa State University Extension
FAQ
Do chili plants flower while still indoors?
Yes. University of Minnesota Extension notes pepper plants may start to flower while still indoors. For seedlings bound for the garden it advises pinching off flower clusters until they are set out. For plants that stay inside under a grow light, let the flowers open plus shake them gently to move pollen.
How warm should the room be for peppers?
University of Minnesota Extension notes a soil temperature of 70F is ideal for peppers plus advises bringing plants inside when nights drop below 55F. It advises waiting to set plants outdoors until nights stay above 50F. A warm room away from cold glass suits chili plants under a lamp.
How long should the grow light run for chili plants?
Iowa State University Extension advises running grow lights 14 hours a day plus notes 12 to 14 hours suits most species. It also notes the dark period is needed for flowering plus fruiting in some species. A plug in timer sets the same schedule each day so the lamp turns off at night.
Why is my indoor chili plant all leaves plus no fruit?
University of Minnesota Extension notes too much nitrogen fertilizer produces bushy leafy plants that are slow to bear fruit. Low light is another cause, since Iowa State University Extension notes vegetables require very high light levels. Feed lightly, lower the lamp plus shake open flowers to help fruit set.
Which chili types suit pots?
NC State Extension lists Basket of Fire as a cultivar bred for hanging baskets plus containers. It also lists compact cultivars such as Early Jalapeno. University of Minnesota Extension notes smaller fruited peppers tolerate cool plus hot temperatures better than large fruited types, which helps in a pot indoors.
