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Dig In: Garden checklist for week of Jan. 19

Chilly mornings (and frost danger) continue for Sacramento area

Someone needs to tell this group of yellow narcissuses (or narcissi) that they jumped the seasonal gun -- though it is nice to see something so cheery in January.

Someone needs to tell this group of yellow narcissuses (or narcissi) that they jumped the seasonal gun -- though it is nice to see something so cheery in January. Kathy Morrison

Cold mornings and sunny afternoons; that’s our current weather pattern and it’s expected to stay that way for another week.

With that combination comes frost danger as well as patchy morning fog – as long as there’s still some moisture in the soil. We’re drying out fast.

According to the National Weather Service, Sacramento will dip to 35 degrees or lower almost every night this week, although no sub-32 nights are forecast (yet). The greatest threat of frost comes in the wee hours Wednesday.

Take frost precautions before you go to bed, including protection of sensitive plants. Don’t forget to water; moist soil can raise temperatures a few crucial degrees.

Check your soil moisture, too; with the lack of rain, you may need to irrigate, especially new transplants. No rain is in our forecast for at least another week.

Otherwise, our daytime temperatures will continue to be slightly above normal with afternoons hovering around 61 or 62 degrees – above average for mid-January in Sacramento.

Dress warmly in layers – and get to work:

* Apply horticultural oil to fruit trees to control scale, mites and aphids. Oils need 24 hours of dry weather after application to be effective.

* This is also the time to spray a copper-based oil to peach and nectarine trees to fight leaf curl. The safest effective fungicides available for backyard trees are copper soap -- aka copper octanoate -- or copper ammonium, a fixed copper fungicide. Apply either of these copper products with 1% horticultural oil to increase effectiveness.

* Prune, prune, prune. Now is the time to cut back most deciduous trees and shrubs. The exceptions are spring-flowering shrubs such as lilacs.

* Now is the time to prune fruit trees. Clean up leaves and debris around the trees to prevent the spread of disease. The exceptions are apricot and cherry trees, which are susceptible to a fungus that causes dieback if pruned now. Save those until summer.

* Prune roses, even if they’re still trying to bloom. Strip off any remaining leaves, so the bush will be able to put out new growth in early spring.

* Clean up leaves and debris around your newly pruned roses and shrubs. Put down fresh mulch or bark to keep roots cozy.

* When forced bulbs sprout, move them to a cool, bright window. Give them a quarter turn each day so the stems will grow straight.

* Browse through seed catalogs and start making plans for spring and summer.

* Divide daylilies, Shasta daisies and other perennials.

* Cut back and divide chrysanthemums.

* Plant bare-root roses, trees and shrubs.

* Transplant pansies, violas, calendulas, English daisies, snapdragons and fairy primroses.

* In the vegetable garden, plant fava beans, head lettuce, mustard, onion sets, radicchio and radishes.

* Plant bare-root asparagus and root divisions of rhubarb.

* In the bulb department, plant callas, anemones, ranunculus and gladioli for bloom from late spring into summer.

* Plant blooming azaleas, camellias and rhododendrons. If you’re shopping for these beautiful landscape plants, you can now find them in full flower at local nurseries.

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Garden Checklist for week of Feb. 2

During this stormy week, let the rain soak in while making plans for all the things you’re going to plant soon:

* During rainy weather, turn off the sprinklers. After a good soaking from winter storms, lawns can go at least a week without sprinklers, according to irrigation experts. For an average California home, that week off from watering can save 800 gallons.

* February serves as a wake-up call to gardeners. This month, you can transplant or direct-seed several flowers, including snapdragon, candytuft, lilies, astilbe, larkspur, Shasta and painted daisies, stocks, bleeding heart and coral bells.

* In the vegetable garden, plant Jerusalem artichoke tubers, and strawberry and rhubarb roots.

* Transplant cabbage and its close cousins – broccoli, kale and Brussels sprouts – as well as lettuce (both loose leaf and head).

* Indoors, start peppers, tomatoes and eggplant from seed.

* Plant artichokes, asparagus and horseradish from root divisions.

* Plant potatoes from tubers and onions from sets (small bulbs). The onions will sprout quickly and can be used as green onions in March.

* From seed, plant beets, chard, lettuce, mustard, peas, radishes and turnips.

* Annuals are showing up in nurseries, but wait until the weather warms up a bit before planting. Instead, set out flowering perennials such as columbine and delphinium.

* Plant summer-flowering bulbs including cannas, calla lilies and gladiolus.

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