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Dig In: Garden checklist for week of Aug. 23


Prepare for more dry lightning storms (and smoke)



"When thunder roars, go indoors." That's the advice of the National Weather Service this weekend as another round of dry thunderstorms head our way.

Rose leaf with ash
Ash from the wildfires accumulates on a rose leaf. Give plants a rinse in the
morning to get rid of the smoky residue. (Photo: Kathy Morrison)

From Sunday through Tuesday, dangerous weather systems will be blowing across Northern California. The NWS says expect "frequent cloud-to-ground lightning, little to no rain, gusty and erratic winds." Extremely high fire danger is also forecast.

Plus it will be hot with afternoon temperatures still in the high 90s.

A similar storm system brought disastrous consequences last weekend as more than 12,000 lightning strikes touched off about 550 fires, according to CalFire. Smoke from ongoing wildfires, including two of the biggest in California history, still chokes the air throughout the Central Valley.

Concentrate gardening time in the early morning, when temperatures are cooler:

* Water deeply. Give shrubs and trees a deep soaking. Container plants may need daily watering.
* Got ash? Give your plants a gentle morning shower, rinsing off the accumulated grime from leaves.
* To remove the gritty ash from your harvest, gently scrub fruit and vegetables with a vegetable brush and a little dish soap. Fully submerge leafy greens in water with a teaspoon of dish soap, then rinse.
* Don't fertilize. Under these weather conditions, feeding can add to stress to plants instead of promoting growth.
* Tomatoes won't turn fully red during high temperatures. Pick mature tomatoes and let them ripen (and redden) on the kitchen counter.
* Watch out for sunburn. Shade tomatoes, peppers and eggplant still on the vine.
* Pick up and discard fallen fruit and decaying vegetables to avoid pest problems.
* Get to work on your cool-season garden. Plant lettuce, cabbage, broccoli and other winter favorites indoors. Transplant seedling outdoors in September.

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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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