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Dig In: Garden checklist for week of March 23

Sudden warm-up could bring record temperatures (but keep an umbrella handy)

Sacramento Digs Gardening
BY Debbie Arrington PUBLISHED MAR 22, 2025

These little buds will be next year's lemons. Fertilize citrus trees now so they have enough energy and nutrition to produce a healthy crop. Kathy Morrison

The first full week of spring will feel more like May than March. A sudden warming trend will push high temperatures into the 80s on Monday and Tuesday with the possibility of a few records.

But keep your rain gear handy; just as fast as those warm days appeared, they’ll be gone.

According to the National Weather Service, Sacramento will see 80 degrees on Monday and 82 on Tuesday; the all-time hottest March day in Sacramento was 88 degrees and the record for Tuesday is 86.

But later in the week, another storm system will brings lots of clouds, possible showers and much cooler temperatures. With rain expected to arrive overnight Wednesday, Thursday’s expected high is 66 degrees – normal for late March in Sacramento.

Although Monday and Tuesday will definitely feel like tomato-planting weather, hold off another week or two on transplanting summer favorites outdoors. Overnight lows (such as 44 degrees, forecast for Friday) are still too cold. (By the way, 44 is the average low for late March; this part is normal.)

These warm temperatures will prompt rapid growth – especially weeds! Make the most of those sunny breaks and get to work!

* Fertilize roses, annual flowers and berries as spring growth begins to appear.

* Watch out for aphids! Knock them off plants with a strong stream of water from the hose.

* Pull weeds now! Don’t let them get started. Take a hoe and whack them as soon as they sprout.

* Prepare vegetable beds. Spade in compost and other amendments.

* Prune and fertilize spring-flowering shrubs after bloom.

* Feed camellias at the end of their bloom cycle. Pick up browned and fallen flowers to help corral blossom blight.

* Feed citrus trees, which are now in bloom and setting fruit.

* Cut back and fertilize perennial herbs to encourage new growth.

* In the vegetable garden, transplant lettuce and cole family plants, such as cauliflower, broccoli, collards and kale.

* Seed chard and beets directly into the ground. (Soak beet seeds overnight in room-temperature water for better germination.)

* Plant summer bulbs, including gladiolus, tuberous begonias and callas. Also plant dahlia tubers.

* Shop for perennials. They can be transplanted now while the weather remains relatively cool.

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garden chores checklist spring March weather Sacramento gardening tomatoes vegetables flowers citrus fertilizer perennials bulbs compost

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Food in My Back Yard Series

April 22: Should you stock up on fertilizer? (Yes!)

April 15: Grow culinary herbs in containers

April 8: When to plant summer vegetables

April 1: Don't be fooled by these garden myths

March 25: Fertilizer tips: How to 'feed' your vegetables for healthy growth

March 18: Time to give vegetable seedlings some more space

March 11: Ways to win the fight against weeds

March 4: Potatoes from the garden

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Feb. 11: When to plant? Consider staggering your transplants

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Once the clouds clear, get to work. Spring growth is in high gear.

* Set out tomato, pepper and eggplant transplants.

* From seed, plant beans, beets, cantaloupes, carrots, corn, cucumbers, melons, pumpkins, radishes and squash. Plant onion sets.

* In the flower garden, plant seeds for asters, cosmos, celosia, marigolds, salvia, sunflowers and zinnias. Transplant petunias, zinnias, geraniums and other summer bloomers.

* Plant perennials and dahlia tubers for summer bloom. Late April is about the last chance to plant summer bulbs, such as gladiolus and tuberous begonias.

* Transplant lettuce and cabbage seedlings.

* Weed, weed, weed! Don’t let unwanted plants go to seed.

* April is the last chance to plant citrus trees such as dwarf orange, lemon and kumquat. These trees also look good in landscaping and provide fresh fruit in winter.

* Feed citrus trees with a low dose of balanced fertilizer (such as 10-10-10) during bloom to help set fruit. Keep an eye out for ants.

* Apply slow-release fertilizer to the lawn.

* Thoroughly clean debris from the bottom of outdoor ponds or fountains.

* Start thinning fruit that's formed on apple and stone fruit trees -- you'll get larger fruit at harvest (and avoid limb breakage) if some is thinned now. The UC recommendation is to thin fruit when it is about 3/4 of an inch in diameter. Peaches and nectarines should be thinned to about 6 inches apart; smaller fruit such as plums and pluots can be about 4 inches apart. Apricots can be left at 3 inches apart. Apples and pears should be thinned to one fruit per cluster of flowers, 6 to 8 inches apart.

* Azaleas and camellias looking a little yellow? If leaves are turning yellow between the veins, give them a boost with chelated iron.

* Trim dead flowers but not leaves from spring-flowering bulbs such as daffodils and tulips. Those leaves gather energy to create next year's flowers. Also, give the bulbs a fertilizer boost after bloom.

* Pinch chrysanthemums back to 12 inches for fall flowers. Cut old stems to the ground.

* Mulch around plants to conserve moisture and control weeds.

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