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Learn how to tackle yellow starthistle


Sacramento Digs Gardening logo
Sacramento Digs Gardening
PUBLISHED NOV 12, 2019
Yellow starthistle ( Centaurea solstitialis ) in bloom
has nasty
spikes.  At top, the seed dispersal stage.
(Photo courtesy UC Integrated
Pest Management)

I nvasive weed is topic of El Dorado County workshop

What’s the worst invasive plant? For many farmers as well as suburban gardeners, it’s yellow starthistle.

Learn how to conquer this nasty weed during a special presentation at 9 a.m. Saturday, Nov. 16. Presented by the UC Cooperative Extension Master Gardeners of El Dorado County, this free workshop will be held in the Hearing Room at Government Center Building C, 2850 Fairlane Court,
Placerville.

Master gardener Steve Savage will tell how this invasive weed has taken over large portions of California’s range land and urban landscape.

Learn about its origins, how it moves, why it is so difficult to control, how to overcome these difficulties, various control methods and how to design an effective control program.

Details and directions: http://mgeldorado.ucanr.edu/ or call 530-621-5512.

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Garden Checklist for week of May 18

Get outside early in the morning while temperatures are still cool – and get to work!

* Plant, plant, plant! It’s prime planting season in the Sacramento area. Time to set out those tomato transplants along with 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.

* Harvest cabbage, lettuce, peas and green onions.

* In the flower garden, direct-seed sunflowers, cosmos, salvia, zinnias, marigolds, celosia and asters. Transplant seedlings for many of the same flowers.

* Plant dahlia tubers.

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

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

* Feed summer bloomers with a balanced fertilizer.

* For continued bloom, cut off spent flowers on roses as well as other flowering plants.

* 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.

* As spring-flowering shrubs finish blooming, give them a little pruning to shape them, removing old and dead wood. Lightly trim azaleas, fuchsias and marguerites for bushier plants.

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