Leggy, floppy seedlings are almost always a light problem, and a sunny window is rarely enough. These T5 style LED strips are what I use to start seeds every season and to keep herbs growing indoors when it is too hot or too cold outside.
Why they earned a spot in my garden
- Strong, stocky seedlings. Close, even light keeps seedlings short and sturdy.
- Easy to set up. The strips link together and mount under a shelf.
- Low heat and power. LEDs run cool, so they can sit close to plants.
- Full spectrum. The light looks close to white, so plants look natural, not purple.
How I use them
- Mount the strips under a wire shelf or on a simple frame over seed trays.
- Keep them a few inches above the seedlings and raise them as plants grow.
- Plug them into a timer set to about 14 to 16 hours on.
- Before planting out, harden off seedlings outdoors for a week or so.
Tips for best results
- If seedlings stretch toward the light, it is too far away.
- A small fan nearby makes stems stronger and helps prevent mold.
- Start seeds in a light mix, then move them into Happy Frog potting soil once they have true leaves.
Who should skip them
If you only grow outdoors in a sunny climate and buy transplants, you may not need grow lights. For growing large fruiting plants fully indoors, you will want a higher output fixture.
Common questions
How far should grow lights be from seedlings?
For LED strips like these, a few inches to about a foot above the seedlings is a common range. If seedlings stretch, lower the light. If leaves bleach, raise it.
How many hours a day should grow lights be on?
Most seedlings and leafy herbs do well with about 14 to 16 hours of light per day. A cheap outlet timer makes this automatic.
Can I grow tomatoes indoors with T5 strips?
They are great for starting tomato seedlings. Growing full size fruiting tomatoes indoors usually needs a stronger light.
Ready to try it in your garden?
Prices and availability change often, so check the current listing on Amazon.
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