Planting the first vegetables, flowers, or shrubs of spring marks a new year of gardening, but growing plants in a greenhouse can mean that season never has to end.

Whether heated or unheated, a greenhouse can make tasks like growing tropical plants and getting a jump on seeding tender annuals easier—and extend your growing season well beyond the summer months.

Here are 12 plants you can grow in a greenhouse, hoop house, or high tunnel.

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