With enough light and heat, you can grow your own vegetables all year round.
Just because the days are getting cooler and shorter here in the northern hemisphere, that doesn’t mean you should stop harvesting homegrown food. Instead, consider starting an indoor garden with edible crops that you can enjoy throughout the winter. According to The Gateway Gardener, it’s not that hard, and actually sounds rather fun.
Generally speaking, plants that are harvested for their leaves tend to do much better indoors than ones whose fruit is eaten. For example, microgreens, sprouts, and lettuces are easier to grow than tomatoes, peppers, and cucumbers.
Planting Your Indoor Vegetable Garden
You’ll need pots of sufficient size with adequate drainage. A four-inch diameter is enough for lettuce and herbs, whereas cherry tomatoes would need a 1-2 gallon pot, and anything larger at least 5 gallons.
Start plants from seeds or buy some starter herb plants at a greenhouse or supermarket. Robert Weaver, editor at The Gateway Gardener, suggests:
Indoor Vegetable Garden Maintenance
Greater care must be taken to keep indoor plants well-lit. If you can, place them in a south-facing window that gets plenty of sunshine and natural light. The reason leafy plants do better than fruiting plants is because the latter requires more light to produce flowers and fruit, but this is achievable with artificial light. Weaver writes:
He compares fluorescents, High Intensity Discharge lights, and LEDs. You can read a more detailed comparison here.
Plants must be watered diligently because indoor air gets very dry in wintertime. Check the soil and, if it feels dry to the touch, add some water.
If you’re growing tomatoes or peppers, you will have to aid with pollination, since there are (hopefully) no bees buzzing around your house. Peppers dislodge their pollen easily, so you can do this by dabbing the flowers with a cotton swab and transferring to other flowers. With tomatoes, use an electric toothbrush simply to jiggle the flower and release pollen to encourage self-pollination.
Best Crops to Grow Indoors
Modern Farmer has a good list, some of which I’ve shared below:
Herbs
Mint is the most shade-tolerant, whereas basil and dill need a room that does not drop below 60F (15.5C) at night.
Greens
Lettuce, arugula, kale, and spinach grow well indoors, but are best harvested as baby greens, before reaching maturity. Brian Barth writes for Modern Farmer, “Greens do not need supplemental light if located in a sunny, south-facing window. Otherwise, provide 10 to 12 hours of artificial light daily.”
Cherry Tomatoes
These grow more readily than full-size tomatoes, although they need 16 hours of artificial light daily and temperatures that do not go below 65F (18C). Chili peppers do well under these same conditions.
Sprouts and Microgreens
Pick up a sprouting kit for an easy way to add fresh crunch to your salads and sandwiches; the seeds germinate and grow quickly and do not require direct sunlight. Microgreens are sprouts grown in soil that have been allowed to grow a bit longer, to develop small leaves. Barth advises,
