Tips for Tomato Growers

May 7, 2004

 

By Art Henzgen, Master Gardener

 

The tomato may be among the most universally planted of all vegetables. It is a subtropical plant, therefore should not be planted outside until a danger of frost has passed.

Plants should be hardened off (allowed to adapt to garden temperatures and sunlight while still in containers) over a few days to avoid shock before planting in the ground. Leaves near the base of the plant should be removed, and the plant placed deeply in soil so that only three or four inches remain above the soil. This gives the plants a much stronger rooting system. If plants are very tall and leggy, they can be placed horizontally in a long trough with only the top showing above ground.

To many people's surprise, the tomato is a drought tolerant plant. Many gardeners tend to over-water it. Except for initia, thorough watering when placing the plant in the ground, the tomato plant will do better with minimum watering. Of course, if the plant starts to wilt, it obviously needs watering.

Plants should produce fruit in 60 to 100 days from planting outdoors. Add another six to eight weeks when starting from seed. Size and variety of plant, location in the garden, and hot and cold weather will effect the amount of time to harvest. When fertilizing, use tomato or all-purpose fertilizer.

Because soil tends to retain tomato diseases such as verticillium, fusarium wilt, and tobacco mosaic, it is most advisable to put tomato plants in a new location or in new potting soil each year.

Plants around
San Luis Obispo, Arroyo Grande, and Nipomo will need either morning or afternoon sun, but not necessarily both. Ditto for plants north of Cuesta Grade. Plants grown near the ocean will probably need full sun.

Plants will ideally be dark green as they mature. After plants are established, if they are light green, they may be getting too much water.

Tomato plants may be grown in the ground or in containers of five gallons or larger. A smaller container may be used for patio tomatoes.

If the weather gets too hot in the summer, consider shading your tomato plants.

University of California Cooperative Extension Master Gardener Volunteers can provide additional gardening information upon request. Call the San Luis Obispo office at 781-5939 on Mondays and Thursdays from 1 to 5 PM, the Arroyo Grande office at 473-7190 on Wednesdays from 9 AM to 1 PM, or the Paso Robles office at 237-3100 on Wednesdays from 9 AM to Noon.  The San Luis Obispo Master Gardener website is at http://groups.ucanr.org/slomg/. Questions can be e-mailed to mgsanluisobispo@ucdavis.edu.