Tips For Growing Spinach In Containers | Gardener's Path

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Gardeners in Zones 2 to 5 can start seeds indoors (more on that below) two to four weeks before the average last frost date, or sow outdoors in your containers two weeks after last frost.

Before you begin, you’ll need to select a potting mix. You can use a blend of one part topsoil purchased from a gardening store, one part well-rotted manure or compost, and one part peat moss.

Alternatively, use a potting mix such as Nature’s Care Organic Potting Mix, available at Home Depot.

A close up square image of two gardeners emptying a bag of Nature's Care Potting Mix into a large whiskey planter container.

Nature’s Care Organic Potting Mix

Whatever you use, the soil should be loose, rich, and well-draining.

When your planter is filled to about two inches from the rim with your desired growing medium, it’s time to add the plant or seeds.

Each eight to 10-inch container can hold one plant, so make one half-inch divot in the center of the planter and drop two seeds inside. I always sow two seeds in each hole in case one fails to germinate.

If you are using a larger container, space the plants four inches apart if you wish to harvest baby greens, or six inches apart for mature leaves.

Keep the soil moist until germination occurs, which should take about seven to 10 days. I like to use a spray bottle so that I don’t dislodge the seeds.

Thin your seedlings when they are four to six inches tall.

A close up horizontal image of a terra cotta pot with tiny seedlings just starting to germinate.

Alternatively, you can start seeds indoors in flats filled with seed-starting mix about two to four weeks before your area’s average last frost date.

Make a half-inch divot in each cell and drop two seeds inside. Keep the soil moist until germination, and then move the trays to a windowsill that receives at least six to eight hours of sunlight.

Or, you may want to put them under grow lights for 10 to 12 hours a day.

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