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Dig In: Garden checklist for week of June 16

Red Flag Warning signals dry conditions, high fire danger

Have you planted sunflowers yet? They grow quickly and provide color all summer (not to mention pollen that's popular with bees).

Have you planted sunflowers yet? They grow quickly and provide color all summer (not to mention pollen that's popular with bees). Kathy Morrison

Crispy: that describes weather conditions for this coming week – as well as a lot of grasses and overgrowth.

According to the National Weather Service, a Red Flag Warning – signaling high fire danger – is in effect through Sunday night. Low humidity (as low as 10% during afternoons) and gusty winds (up to 35 mph) can rapidly spread flames. Watch out for wildfire.

Be extra careful not to produce any sparks. Avoid using power equipment; a mower blade hitting a rock can set brown grass ablaze. A trailer dragging a chain can ignite roadside weeds. Those windy conditions can rapidly turn a little flame into a raging inferno.

Instead, concentrate on keeping things irrigated – and tied down. Those winds can knock down vines and fruit, too.

Once the wind dies down, we’ll settle into a typical June pattern for these last few days of spring, says the weather service. High temperatures this week will bounce around 90 degrees with overnight lows in the high 50s. Normal for this week: Highs of 87 and lows of 56.

Summer officially starts Thursday. The good news: No triple-digits – at least until next weekend.

Make the most of this cooler weather. Your garden needs you.

* Warm weather brings rapid growth in the vegetable garden, with tomatoes and squash enjoying the heat.Water deeply, then give a balanced fertilizer. Bone meal or rock phosphate can spur the bloom cycle and help set fruit.

* 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.

* Tie up vines and stake tall plants such as gladiolus and lilies. That gives their heavy flowers some support.

* Dig and divide crowded bulbs after the tops have died down.

* Feed summer flowers with a slow-release fertilizer.

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

* Thin grapes on the vine for bigger, better clusters later this summer.

* Trim off dead flowers from rose bushes to keep them blooming through the summer. Roses also benefit from deep watering and feeding now. A top dressing of aged compost will keep them happy. It feeds as well as keeps roots moist.

* Pinch back chrysanthemums for bushier plants with many more flowers in September.

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

* Plant basil to go with your tomatoes. 

* Transplant summer annuals such as petunias, marigolds and zinnias.

* It’s also a good time to transplant perennial flowers including astilbe, columbine, coneflowers, coreopsis, dahlias, rudbeckia, salvia and verbena.

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Garden Checklist for week of Feb. 16

Take advantage of this nice weather. There’s plenty to do as your garden starts to switch into high gear for spring growth.

* This is the last chance to spray fruit trees before their buds open. Treat peach and nectarine trees with copper-based fungicide. Spray apricot trees at bud swell to prevent brown rot. Apply horticultural oil to control scale, mites and aphids on fruit trees.

* Check soil moisture before resuming irrigation. Most likely, your soil is still pretty damp.

* Feed spring-blooming shrubs and fall-planted perennials with slow-release fertilizer. Feed mature trees and shrubs after spring growth starts.

* 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 cauliflower – 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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