Soil temperatures might still be too cool
A pepper seedling, planted too early, gives a good impersonation of a Charlie Brown Christmas tree. Peppers need warm air and ground temperatures to thrive.
Like many of you, I bought my tomatoes and peppers at one of the Master Gardener's spring market sale.It was so cold and rainy that I wasn't overly enthusiastic to get out and work in the gardenso I grouped my plantstogether, sat them next to the garden shed for a little warmth and protection and decided to let them be.
Then, ignoring what experience has taught me, I decided to put them in the ground. And I paid a price for my impatience.
Planting too early in cooler temperatures can cause stunted growth, wilting, surface pitting,foliage necrosis and increased susceptibility to disease. Low soil temperatures can stunt plant growth andprevent root development.Most summer vegetables like soil temperatures of between 55 and 65 degrees.
Because my plants had just come from a greenhouse, where they were pampered with lots of light, waterand warmth, they really needed to be hardened off before planting. Hardening off means to keep yourseedlings in protected area, such as a porch or garage, and gradually acclimate them to their new environment, placing themoutdoors in a shady spot for a couple of hoursand slowly increasing the time. Plants that aren't properlyhardened off are much more susceptible to sun and windburn as well as breakage.
We also recommend plantingyour seedlings into larger containers as soon as you bring them home.
So what happened when I didn't follow the prudent planting process? Well, one of my tomatoes snappedin half and I have a couple of peppers that look very much like the sadlittle tree in “A Charlie Brown Christmas.”I'll be starting over with some new seedlings and a bit more patience.
Tips for planting
- Plant your tomatoes deep (up to leaves you didn't pinch off)
- Amend soil with a high-quality compost (if needed)
- If planting in containers or raised beds, add slow release, organic fertilizer and compost
- Add tomato cages when you plant, if you wait until they need the support you can damage the roots
- And remember, peppers and tomatoes need 6 to 8 hours of sun. They also likewell-draining soil and a pH of 6.5-7.0.
- Mulch around plants to help retain moisture and cut down onweeds.
- To avoid fungal issues such as fusarium and verticillium wilt, don't plant in the same area for 3 years, if possible.
- To avoid blossom end rot, make sure to provide consistent and deep watering.
- One of themost common tomato ailments is tobacco mosaic virusso don't smoke in or near your garden.
- Look forplants that are labeled disease resistant.
- The rains are tapering off, so make sure to keep young plants well watered. Peppers like to be keptevenly moist, but once tomatoes and peppers start fruiting you can significantly cut back on their water.
by UC Master Gardener Rebecca Jepsen
Photo: RebeccaJepsen
This article first appeared in the April 30 issue of the San Jose Mercury News.
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