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'Amazing Acacias' ready to put on show


Acacias produce masses of bright yellow blooms in late winter. See the collection at UC Davis on Saturday.
(Photo: Courtesy UC Davis Arboretum)
UC Davis Arboretum tour showcases unusual trees, shrubs

In late February, the
Eric E. Conn Acacia Grove offers one of the prettiest walks on the UC Davis campus. Near Putah Creek, bright yellow acacia blossoms cover trees and shrubs big and small, creating a memorable spectacle.

See those trees in their late winter glory during a free guided tour, presented by the UC Davis Arboretum. At 2 p.m. Saturday, Feb. 23, “Amazing Acacias” will explore the grove and more than 50 species of acacias.

Native to Australia, Africa and parts of the Americas, acacias produce masses of fuzzy and fragrant blooms. Leaves of thorny varieties from Africa are the favorite food of giraffes. Nicknamed wattles, thornless acacias come from Australia. America’s best known acacia is the Hawaiian koa tree

The Conn Collection focuses on species that can survive cold as well as heat. These versatile, low-maintenance evergreen trees and shrubs also are remarkably drought tolerant and well adapted to the Sacramento landscape. Snowy River wattle ( Acacia boormanii ) earned distinction as an Arboretum All-Star and is offered in the arboretum’s spring sales.

For the acacia tour, meet at Putah Lodge. Parking is free on weekends and available in Visitor Lot 55. Wear comfortable shoes for this 90-minute walking tour.

Details: arboretum.ucdavis.edu or call (530) 752-4880.

- Debbie Arrington

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Garden Checklist for week of Jan. 12

Once the winds die down, it’s good winter gardening weather with plenty to do:

* 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. (The exceptions are apricot and cherry trees, which are susceptible to a fungus that causes dieback. Save them until summer.) Clean up leaves and debris around the trees to prevent the spread of disease.

* 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.

* After the wind stops, 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 fungicide 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.)

* 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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