A note on suppliers… LED grow lights are a growing breed. 1: Spinach. Lauren Kurtz is a Naturalist and Horticultural Specialist. This article has been viewed 296,556 times. Plan the perfect garden with our interactive tool →, University of Utah: Fresh and Tasty Winter Salads: Gardening under lights. If you would like to keep track of when you gave your lettuce some fertilizer then stick a notepad on the wall by the grow light and write down the date when you last fertilized the lettuce. Last year, I purchased grow lights to start seedings in early spring. Plants grown under lights indoors need more hours of light than the same plants do outdoors. It may dark and chilly in November in most parts of the country, but a true gardener will always find a way to keep growing plants, even under adverse conditions. And, a month after planting, your lettuce plant will be ready to harvest! We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. In that case, you might as well grow green leaf lettuce as it will grow more vigorously than red leaf under poor light. Harvest the outer leaves from the lettuce and spinach as needed. But first, you need to do your research on how to grow vegetables indoors under lights. If you aren't sure, purchase your lettuce from a local nursery and ask about varieties that do well when grown indoors. LED (Light-Emitting-Diode) is the least expensive indoor grow light to run, but not necessarily to buy and setup, depending how many you need. Remove the plastic when seedlings emerge. Growing lettuce indoors is easy but there are some tips you need to follow. This article was co-authored by Lauren Kurtz. Lettuce Variety Some claim higher. Your chosen location must also be a safe one. We've had great success with the Mars Hydro SP 150 LED grow light . By using this service, some information may be shared with YouTube. What is the best lettuce to grow indoors? Leave the lights on for 16 hours a day. We use cookies to make wikiHow great. Whether you've run out of space in your garden or you want to grow lettuce year round, you can grow lettuce plants quickly and easily indoors. Lauren Kurtz is a Naturalist and Horticultural Specialist. References Keep in mind that plants grown under a grow light generally need more time under the light than they would with natural sunlight. Start the Lettuce. These lettuce plants are growing under the high-output LED lamps in the Low Bamboo LED Grow Light Garden . In fact, any leafy green, like spinach and kale will grow rapidly when grown under grow lights. This time of the year it sits unused as its a bit too early for spring plantings. Use a liquid fertilizer. I am trying to grow lettuce indoors for the first time. Some edibles, such as leafy greens, can grow in bright windowsills indoors, but in areas with less natural light, you'll need grow lamps for a good harvest. Lauren has worked for Aurora, Colorado managing the Water-Wise Garden at Aurora Municipal Center for the Water Conservation Department. "Very good how-to on growing lettuce indoors. Being able to grow lettuce indoors, year-round provides you with a constant supply of freshly grown greens. The more expensive grow lights work too, but aren't necessary for growing greens. I had been looking over the GardenWeb “Growing Under Lights” forum and was asking questions about what fluorescent bulbs would be best to grow lettuce. Caring For Your Lettuce. Learn which plants thrive in your Hardiness Zone with our new interactive map! In this case, 91% of readers who voted found the article helpful, earning it our reader-approved status. The hotter the temperatures, the more often you will need to water your lettuce. Approved. Although most lettuce plants can stay healthy indoors, you'll have better success with some varieties over others. Lauren has worked for Aurora, Colorado managing the Water-Wise Garden at Aurora Municipal Center for the Water Conservation Department. How to Plant Seeds Under Grow Lights Pick a Grow Light . Using grow lights, available at most stores that sell light bulbs, allows you to provide the proper spectrum of lights for your spinach and lettuce to thrive. Place the pots under grow lights so the lights are positioned 6 inches above the top of the seedlings. Because you are growing indoors, you will need a pot, a light source (led grow light). Cut them off at the base of the plant and use within one to three days. Each lettuce plant requires 4–6 in (10–15 cm) of space and a depth of about 8 inches (20 cm). Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. The water should not cover all the lettuce, just the root part, and it should be in a place where it gets sunlight, but not too direct. 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