Sacramento Digs Gardening: Dig In: Garden checklist for week of April 18

Small tomato plant in ground with red cage

That little tomato seedling will get a good boost from the warm weather the

next few days. But if your plants aren't in the ground yet, hold off until the temps drop back down -- the seedlings will be less stressed when they do go in. (Photo: Kathy Morrison)

Our spring weather will quickly feel like summer this weekend as a mild heat wave spikes temperatures.

According to the National Weather Service, several Central Valley locations will see their first 90-degree days of 2021 on Sunday and Monday. Fortunately, afternoon highs will cool down just as quickly. We’ll be comfortably back in the low 80s by Tuesday.

This warmth will stick around after dark, with overnight lows staying above 50. That’s warming the soil, too; good news for tomato gardeners!

Newly transplanted seedlings will be comfortable enough to get off to a good start. But wait until after Monday to put new plants in the ground. They’ll have less stress if they don’t have to endure 90-degree temperatures their first days in their new homes.

Remember to keep transplants and newly planted seeds watered. There’s still no rain in sight.

Also on this week’s to-do list:

* Feed shrubs and trees with a slow-release fertilizer. Or mulch with a 1-inch layer of compost.

* 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.

* Set out tomato, pepper and eggplant transplants.

* From seed, plant beans, beets, carrots, corn, cucumbers, all melons, 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.

CHECKLIST FOR THE WEEK

Your weekly checklist of activities in the garden.

Keywords:

seeds tomatoes Sacramento spring planting chrysanthemums weather gardening vegetables chelated iron mulch shrubs spring bulbs flowers transplants

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Flowers in My Back Yard Series

April 21: Celebrate roses, America's favorite flower

April 14: Small flowers with outsized impact

April 7: Calendulas do double duty

April 3: Make Easter lilies last for years to come

March 31: In praise of a pollinator magnet (small-leaf salvias)

March 24: Azaleas brighten shady spots

March 17: The perfect flower for beginners? Try zonal geraniums

March 10: Keep camellias happy for years to come

March 3: Fruit tree blossoms are a fleeting joy

Feb. 27: Are your roses looking rusty?

Feb. 24: Treasure spring daffodils now and for years to come

Feb. 17: How and why to grow wildflowers

Feb. 10: Let's talk Valentine's Day roses

Feb. 3: Why grow flowers?

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Garden checklist for week of April 19

After this midweek storm, start getting serious about spring gardening. Flowers are blooming about three weeks ahead of schedule. That includes weeds!

* Get ready to swing into action in the vegetable garden – if you haven’t already. As nights warm up over 50 degrees, set out tomato, pepper and eggplant transplants.

* From seed, plant beans, beets, cantaloupes, carrots, corn, cucumbers, melons, radishes and squash; wait on pumpkins until May. 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.

* 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.

* Smell orange blossoms? Give citrus trees a low dose of balanced fertilizer (such as 10-10-10) during bloom to help set fruit. Keep an eye out for ants. If leaves look yellow, your tree may need an iron boost -- apply some chelated iron fertilizer.

* Apply slow-release fertilizer to the lawn.

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

* Spring brings a flush of rapid growth, and that means your garden needs nutrition. Give shrubs and trees a slow-release fertilizer. Mulch with a 1-inch layer of compost, which helps the soil, but keep it a few inches away from trunks and stems.

* 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.

Send us a gardening question, a post suggestion or information about an upcoming event. sacdigsgardening@gmail.com

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