Sacramento Digs Gardening: Dig In: Garden checklist for week of June 9

Straw mulch retains soil moisture and keeps roots cool during hot weather. (Photos: Kathy Morrison)

Help your garden cope with triple-digit heat

The heat is on! After several days of relatively mild temperatures, triple-digit highs are in the immediate forecast – about 15 degrees above normal for mid-June.

Is your garden ready?

Help your tomatoes and other veggies cope with these tips:

* Generally, tomatoes need deep watering two to three times a week, but don't let them dry out completely. That can encourage blossom-end rot. On average, each tomato plant needs about five gallons a week.

Tomato flowers may not set fruit during triple-digit days.

* One consequence of hot weather: Tomatoes may drop their flowers without setting fruit. Tomato pollen loses its fertility over 95 degrees.

* Mulch, mulch, mulch! This “blanket” keeps moisture in the soil longer and helps your plants cope during hot weather. Mulch can help reduce heat stress.

* Avoid pot “hot feet.” Place a 1-inch-thick board under container plants sitting on pavement. This little cushion helps insulate them from radiated heat.

* Feed camellias, azaleas and other acid-loving plants. Make sure to water first.

* Let the grass grow longer. Set the mower blades high to reduce stress on your lawn during summer heat. To cut down on evaporation, water your lawn deeply during the wee hours of the morning, between 2 and 8 a.m.

* From seed, plant corn, pumpkins, radishes, squash and sunflowers.

* Plant basil transplants to go with your tomatoes.

* Transplant summer annuals such as petunias, marigolds and zinnias. They’ll help attract pollinators to your summer vegetables.

CHECKLIST FOR THE WEEK

Your weekly checklist of activities in the garden.

Keywords:

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Garden Checklist for week of May 5

Survey your garden after the May 4 rainstorm. Heavy rain and gusty winds can break the neck of large flowers such as roses. Also:

* Keep an eye on new transplants or seedlings; they could take a pounding from the rain.

* Watch out for powdery mildew. Warmth following moist conditions can cause this fungal disease to “bloom,” too. If you see a leaf that looks like it’s dusted with powdered sugar, snip it off.

* After the storm, start setting out tomato transplants, but wait on the peppers and eggplants (they want warmer nights). Pinch off any flowers on new transplants to make them concentrate on establishing roots instead of setting premature fruit.

* Trim dead flowers but not leaves from spring-flowering bulbs such as daffodils and tulips. Those leaves gather energy to create next year's flowers. Also, give the bulbs a fertilizer boost after bloom.

* Pinch chrysanthemums back to 12 inches for fall flowers. Cut old stems to the ground.

* Mulch around plants to conserve moisture and control weeds.

* From seed, plant beans, beets, cantaloupes, carrots, corn, cucumbers, melons, pumpkins, radishes and squash.

* Plant onion sets.

* In the flower garden, plant seeds for asters, cosmos, celosia, marigolds, salvia, sunflowers and zinnias. Transplant petunias, zinnias, geraniums and other summer bloomers.

* Plant perennials and dahlia tubers for summer bloom.

* Don’t wait; plant summer bulbs, such as gladiolus and tuberous begonias.

* Harvest cabbage, lettuce, peas and green onions.

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