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Know when to pick the sweetest oranges


Navel oranges ripen first, in December or January in the
Sacramento region. A taste test is the best way to tell if
they are sweet and ready to pick. (Photo: Kathy Morrison)
Color alone won't signal full ripeness



How do you tell when to pick oranges? How about grapefruit or other citrus?

When it comes to citrus, color is not enough. You need to take a taste test.

Citrus ripen slowly, often taking nine months or more to reach their peak of flavor. They also can hang on the tree for months after maturity.

Adding to the puzzle: Citrus will look ripe long before they are ripe. That leads many gardeners to despair that they planted a “bad” orange or grapefruit variety that will never produce “good” fruit.

Right now, navel oranges are reaching full ripeness while Valencias are still a month or more away. Grapefruit, too, need more time.

Weather, climate and growing conditions all factor into the citrus calendar. Grapefruit grown in Sacramento can take 12 to 18 months to reach full ripeness, twice as long as the same grapefruit varieties grown in Coachella. The more summer heat, the faster citrus develops.

Citrus do not ripen off the tree. Once picked, they won’t get sweeter or juicier. Bitter or dry oranges often were just picked too early. In addition, oranges benefit from “a kiss of cold” (overnight temperatures in the 30s) to bring out their natural sugars.

This month, our oranges finally got that “kiss,” and taste much sweeter for it.

According to local citrus experts, ripe citrus looks bright and full colored. But it also feels heavy for its size and firm when squeezed. A fully ripe orange or lemon will slip easily off its stem without tugging. To pick, gently twist and pull at the same time.

The best way to judge ripeness is by tasting. Pick fruit from opposite sides of the tree and sample. Fruit growing on the outside of the tree tends to ripen faster than fruit that grows closer to the trunk. If the trial oranges taste sweet, the tree is ready to pick. If not, wait a week, then sample again.

Oranges are the trickiest to judge. Variety plays a key role. Navel oranges (the popular seedless eating variety) ripen in December and January in Sacramento. They will hold on the tree until March.

Meanwhile, Valencias (the juice orange) may turn color in winter, but aren’t really ready until late February or March. They keep ripening through early June, until the tree finally pushes them off to make room for new fruit.

For more citrus tips:
https://fruitsandnuts.ucdavis.edu .

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Garden Checklist for week of Dec. 8

Make the most of dry weather while we have it this week. Rain is returning.

* Rake leaves away from storm drains and gutters. Recycle those leaves as mulch or add to compost.

* It’s not too late to plant something. Seed wildflowers and plant such spring bloomers as sweet pea, sweet alyssum and bachelor buttons.

* Trees and shrubs can be planted now, especially bare-root varieties such as fruit trees or rose bushes. This gives them plenty of time for root development before spring growth. They also benefit from winter rains.

* Plant bare-root berries, kiwifruit, grapes, artichokes, horseradish and rhubarb.

* Set out cool-weather annuals such as pansies and snapdragons.

* Lettuce, cabbage and broccoli also can be planted now.

* Brighten the holidays with winter bloomers such as poinsettias, amaryllis, calendulas, Iceland poppies, pansies and primroses.

* Keep poinsettias in a sunny, warm location; bring them inside at night or if there’s rain.

* Plant garlic and onions.

* Prune non-flowering trees and shrubs while they’re dormant.

* Clean and sharpen garden tools before storing for the winter.

* Mulch, water and cover tender plants to protect them during threat of frost. Succulent plants are at particular risk if temperatures drop below freezing. Make sure to remove coverings during the day.

* Rake and remove dead leaves and stems from dormant perennials.

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