---
title: "7 Signs Your Plants Could Really Use a Grow Light"
date: "2022-03-28"
modified: "2026-01-15"
authors:
  - name: "Gretchen Heber"
    job_title: "Contributing Writer & Editor"
    link: "https://www.bobvila.com/authors/gretchen-heber/"
url: "https://www.bobvila.com/articles/plants-need-grow-light/"
categories:
  - "Lawn & Garden"
tags:
  - "houseplants"
  - "News"
---

# 7 Signs Your Plants Could Really Use a Grow Light

![A single young tomato plant under a LED grow light in a dark room.](<https://www.bobvila.com/wp-content/uploads/2022/03/tomato-plant-under-grow-light.jpeg>)
*Photo: Nikita Sobolkov via Adobe Stock*

Plants grown indoors typically don’t receive as much light as those that spend their lives outdoors. Many houseplants are specifically suited to lower-light conditions and will flourish inside. Some, however, may need supplemental lighting inside to flourish. Most seedlings that are started indoors to be moved outside when the time is right also get a better start when they're helped along by grow lights.

Whatever the case, your plants will let you know they’re not happy and one of the steps you can take to address their distress is to set up some grow lights. Additional light will fuel the plants’ ability to photosynthesize, which in turn leads to the ability to create fuel for growth.

## They're leggy, growing sparsely, or not growing at all.

![Leggy potted succulent grows out of pot onto table and toward window. ](<https://www.bobvila.com/wp-content/uploads/2022/03/leggy-succulent-no-grow-light.jpg>)
*Photo: Red Herring via Shutterstock*

Plants that aren’t as full as they should be, or exhibit leggy growth—long stems with few leaves, spaced-out leaves, or leaves just at the end of the stem—might need more light. The same is true of plants that seem to be stuck in “why-bother” mode; these plants may appear lush and green but show no signs of growth whatsoever. Hit these sad greenies with time under a [quality grow light](<https://www.bobvila.com/articles/best-led-grow-lights/>) and see if they kick into gear.

## They're leaning toward the light.

![Tomato seedlings lean toward sunlight coming through window.](<https://www.bobvila.com/wp-content/uploads/2022/03/phototropism-tomato-seedlings.jpeg>)
*Photo: MW via Adobe Stock*

Phototropism is the way a plant positions itself in relation to its light source. If your plants are leaning aggressively toward a window or other light source, like a toddler stretching to reach a cupcake on the counter, they’re likely telling you they’re not getting enough light. Reward them with an overhead grow light and they’ll straighten up.

## Their leaves are turning brown, yellow, or white.

![Indoor grouping of potted plants, some of which have yellowing or withered leaves.](<https://www.bobvila.com/wp-content/uploads/2022/03/yellowing-plants-need-grow-light.jpg>)
*Photo: Valentina\_G via Adobe Stock*

While discolored leaves can indicate any of a number of concerns, one of those problems can be a lack of light intensity. Plants need light to make chlorophyll, which is what makes plants green. Are the brown or [yellow](<https://www.bobvila.com/articles/yellow-leaves/>) leaves on the side of the plant that faces away from the window? This indicates that your plant needs more light for healthy growth.

## Variegated plants are losing their stripes.

![Variegated African violet leaves with few white stripes.](<https://www.bobvila.com/wp-content/uploads/2022/03/variegated-african-violet.jpeg>)
*Photo: Skywatching via Adobe Stock*

Did you purchase an intriguing [philodendron](<https://www.bobvila.com/articles/philodendron-varieties/>) with whimsical white pinstripes, but now you’re disappointed to discover that its once-dual-hued leaves are a boring solid green? The plant has gone into survival mode, eliminating the white bits in favor of the chlorophyll-filled green parts. It needs the chlorophyll for growth and survival. Situating the plant under a grow light will restore it to its former banded glory.

## They're not producing many (or any) flowers.

![Close up of a potted blue and white African violet flower. ](<https://www.bobvila.com/wp-content/uploads/2022/03/african-violet-grow-light.jpeg>)
*Photo: Tom Fenenga for BobVila.com Dmitry - stock.adobe.com*

[African violets](<https://www.bobvila.com/articles/african-violet-care/>) are popular plants to grow indoors, but if they or other flowering plants in your collection aren’t rewarding your care with their usual showy display of purple and other colors of flowers, a grow light might kick blooming into gear. Plants need a lot of energy to produce flowers, and might be unable to create the colorful blossoms if they are not exposed to light that is intense enough for them to conduct their business.

## You're overwintering outdoor plants indoors.

![Overwintering Mediterranean plants and trees indoors next to a window.](<https://www.bobvila.com/wp-content/uploads/2022/03/overwintering-plants-indoors.jpeg>)
*Photo: Roland Wehinger via Adobe Stock*

Many gardeners [bring their outdoor potted plants inside](<https://www.bobvila.com/lawn-and-garden/plants-to-winter-indoors/>) when winter winds blow. However, plants that are accustomed to bright outdoor light can suffer in dimmer interior light. Consider fixing up a set of grow lights to provide these light-loving plants with the illumination they require to survive to see spring’s glory.

## You're starting new seedlings.

![Seedlings under a grow light, with a window on a clear day in the background.](<https://www.bobvila.com/wp-content/uploads/2022/03/plants-grow-lights-shelves.jpg>)
*Photo: iStock istockphoto.com*

Like children who eat seemingly nonstop to fuel their growth, seedlings require 12 to 16 hours of light a day to get a foothold on life. If you are [starting vegetable and flower seedlings indoors](<https://www.bobvila.com/articles/starting-seeds-indoors/>) and will move them outside once it warms up, it's a good idea to provide them with a grow light or two to ensure they get off to the best start possible.

## Author
Gretchen Heber is a writer, marketer, and entrepreneur based in Texas. A former garden editor and designer with the [Austin American-Statesman](<https://www.statesman.com>) and [Lexington Herald](<https://www.kentucky.com>), she is passionate about succulents, herbs, and fruit trees, as well as lighting, energy efficiency, and all things home.