No matter where you live in Iowa, the average last frost date has passed and that means it’s high time to get your warm season vegetable crops in the ground. Lima beans, pole beans, okra, tomatoes, peppers, eggplant, squash, and melons can get started in your garden with very low risk of damage from frost.
Seeding and Spacing
Maximizing production from a small garden space will require you to use space efficiently. If you are starting plants from seed, like most beans, squash, and melons, plant nearly double the number of seeds than plants with which you would like to end up. It’s easier to thin seedlings to the appropriate spacing than to try to fill in empty spaces later. Vining crops like pole beans, winter squash, and watermelons are particularly space intensive. Consider growing them up simple support structures like strings, nets, or trellises so they are occupying vertical space rather than crowding and shading the other plants in your garden.
Transplants and Hardening Off
If you are starting plants from transplants, like most tomatoes, peppers, and eggplant, be sure to allow the transplants to acclimate to the outdoors slowly. A week or so before you intend to put them in the garden, put your transplants outdoors in an area protected from the elements; then gradually expose them to greater and greater periods of sun while watering with less and less frequency. This process is known as hardening off, and will give your transplants a better chance of survival once they go into the garden.
Mulch to Reduce Weeding
Finally, with all that space between these warm season vegetables, there may be a substantial amount of bare soil where weeds can invade until the vegetable plants form a canopy. Try to reduce the weeding required by putting mulch down between the vegetable plants. Mulch will help even out soil temperature and moisture during periods of extreme heat and/or drought. A thick layer of organic material like straw, newspaper, or wood chips will make very effective mulch, and can often be obtained at little or no cost.
Andy Larson, ISU Extension - Small Farm Sustainability
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