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Dig In: Garden checklist for week of May 15

Warm days, nights will prompt rapid growth of summer vegetables

Young squash plants
Straw is an excellent mulch for summer squash and other summer vegetables: It's light but helps prevent the soil from drying out. And that droopy leaf at left? That's a normal reaction to afternoon heat by squash, melons and tomato plants.
The time to worry (and water) is when they droop in early morning. (Photo: Kathy Morrison)

Mid May will feel a lot like mid June as Sacramento settles into a pattern of warm, dry days with above-normal temperatures.

According to the National Weather Service, Sacramento will see three or four days in the low 90s this week with the remainder in the mid to high 80s. Overnight lows are warm, too, with some nights staying above 60. Historically in May, Sacramento averages highs of 80 degrees and lows of 51.

Those above-average nights mean soil temperature will be warming, too. Expect rapid growth from tomatoes, peppers, eggplant and squash as they soak up that early heat.

While that heat is good for summer crops, it likely will push remaining cool-season vegetables over the top. Harvest cabbage, lettuce, kale, broccoli, beets, carrots, chard, spinach and similar veggies before they go to seed. High temperatures also can turn lettuce and other leafy greens bitter. Pick them now and store in the refrigerator crisper drawer.

Those 90-degree days will crisp roses and other spring blooms. Take some time this week for clean up. Get chores done early to avoid afternoon sun.

* Deadheading – cutting off spent flowers – will extend bloom season for many shrubs, especially roses. Expect another round of roses six to eight weeks after deadheading re-blooming varieties.

* Keep an eye out for slugs, snails, earwigs and aphids that want to dine on tender new growth.

* Feed summer flowering shrubs and perennials with a balanced fertilizer.

* Are birds picking your fruit off trees before it’s ripe? Try hanging strips of aluminum foil on tree branches. The shiny, dangling strips help deter birds from making themselves at home.

* Run the sprinklers early in the day – before 8 a.m. if possible – to conserve water and minimize plant diseases.

* Mulch around trees and shrubs as well as plants in the vegetable garden. Mulch conserves moisture and cuts down on weeds.

* Transplant tomatoes, peppers and eggplants. Pinch off any flowers on new transplants to make them concentrate on establishing roots instead of setting premature fruit.

* Direct-seed melons, cucumbers, summer squash, corn, radishes, pumpkins and annual herbs such as basil.

* In the flower garden, direct-seed sunflowers, cosmos, salvia, zinnias, marigolds, celosia and asters.

* Transplant petunias, marigolds and perennial flowers such as astilbe, columbine, coneflowers, coreopsis, dahlias, rudbeckia and verbena.

* Don’t forget to water. Seedlings need moisture. Deep watering will help build strong roots and healthy plants.

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Dig In: Garden checklist for week of Oct. 2

Plan to make the most of the mild weather in your garden.

* October is the best month to plant trees and shrubs.

* October also is the best time to plant perennials in our area. Add a little well-aged compost and bone meal to planting holes or beds, but hold off on other fertilizers until spring. Keep the transplants well-watered (but not wet) for the first month as they become settled.

* Now is the time to plant seeds for many flowers directly into the garden, including cornflower, nasturtium, nigella, poppy, portulaca, sweet pea and stock.

* Plant seeds for radishes, bok choy, mustard, spinach and peas.

* Plant garlic and onions.

* Set out cool-weather bedding plants, including calendula, pansy, snapdragon, primrose and viola.

* Reseed and feed the lawn. Work on bare spots.

* Dig up corms and tubers of gladioluses, dahlias and tuberous begonias after the foliage dies. Clean and store in a cool, dry place.

* Treat azaleas, gardenias and camellias with chelated iron if leaves are yellowing between the veins.

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