Tips for Growing Tomatoes in a Winter Greenhouse
- To grow tomatoes in a winter greenhouse, you’ll need a system to prevent the water from freezing. Tomatoes require two to three quarts of water per day when it’s sunny outside. Ensure drainage holes at the top and bottom of grow bags and that pots have good drainage.
- The ideal range for daytime greenhouse temperatures for growing tomatoes is 70 to 80°F. At night, it’s 60 to 65°F. Temperatures above 85°F risk issues with ripening. Consider hanging a shade cloth and opening windows in summertime if necessary.
Overwintering Summer Bedding Plants in a Greenhouse
- Many summer bedding plants like fuchsias and pelargoniums can be overwintered in an unheated greenhouse. The extra protection provided will keep these plants alive.
Growing Tomatoes Indoors in Winter
- Tomatoes need sunlight for normal development. This can be tricky in winter with shorter days. Use grow lights a few inches above the plant for 12 to 14 hours. Put plants on a windowsill and add extra lights. Don’t put plants close to drafty windows. Use a humidifier as humidity drops in winter. Water when soil dries out.
Winter Tomato Growing Tips
5 Tips on Growing Tomatoes Indoors This Winter:
- Know which small, upright variety to pick
- Use unglazed pots with good drainage
- Bring plants inside at summer’s end to preserve
- Sow seeds in successive batches for season-long supply
- Start seeds indoors in starter mix 1⁄4 inch deep
Main Winter Growing Methods
- There are three main winter growing methods: specialized varieties, indoors, and greenhouses. Some varieties are more cold-tolerant and shorter season, suitable for cooler climates and seasons.