Taste-test the fruit -- every year can be slightly different
These Washington navel oranges are very close to ripe. Taste one if you're not sure -- but it's best not to pick them all at once. Kathy Morrison
In early December a few years ago, I arrived at my community garden and noticed that the little navel orange tree in the Garden of Eatin' area (available to all the gardeners) had been picked clean. Oh, no, I thought, those oranges weren't ripe yet.
Sure enough, one of the other gardeners mentioned that he had tried one. "It was sour!" he said with surprise. Yes, the fruit had been orange in color, but it was too soon -- the sweetness that develops with colder weather hadn't happened yet. Another (small) crop lost to inexperience with the quirks of citrus trees.
Growing citrus can be, as I noted once, like keeping a pet cat: You love it, but rarely understand it. The trees follow their own calendar, which is nothing like the timelines for cherries or apples. The master gardener help desk often receives questions about citrus trees or fruit from perplexed homeowners.
Some citrus can be used at various stages of ripeness -- limes being a good example -- but navel oranges need to be fully ripe to be enjoyed.
So how to tell? There are clues: They should have full color, be heavy for their size, and be firm but not rock-hard -- they should give just slightly when squeezed.
But by far the best test is tasting one, or two, really: One from each side of a full-size tree. (One from a container tree should be plenty.) If it doesn't taste ripe, wait a week and try again.
One of my neighbors traditionally picks all her oranges on Christmas Day. That to me is a gamble -- and unless she gives most of the fruit away, creates other problems. Storage, for one. (If you must: Keep them in boxes in a cold garage, in one layer. Or juice them and freeze the juice.)
Also, citrus does not ripen off the tree, so whatever stage that fruit was in will be the stage it stays in, until it's eaten or rots.
"Storing" the fruit on the tree is generally the best move, with one caveat: If a hard frost is expected, pick all the ripe fruit before the cold hits. Make sure the tree is well-watered, too. Orange trees can survive temperatures down to 21 degrees, but the fruit may be damaged below 27 degrees or so, according to the UC Cooperative Extension experts. (The Sacramento master gardeners' Garden Note 127, "Growing Citrus in Sacramento," has a wealth of information. It can be found via "The Home Orchard" page on the master gardeners' website; it's the first link under Master Gardener publications and videos.)
"Citrus sensitivity to cold also depends on how long it stays cold, whether the trees are exposed or in a protected area, whether the trees are in a low area where cold air collects, and how old the trees are," the information also explains.
So become familiar with the timeline for your own tree or trees, noting the changes in the weather as winter continues. And enjoy those gorgeous oranges you've been growing all these months!
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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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