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Easy-going rhubarb can be finicky in our climate

Sacramento tends to be too hot and dry for this spring perennial to flourish

Sacramento Digs Gardening
BY Debbie Arrington PUBLISHED JAN 20, 2021

This is the goal: Fat red rhubarb stalks for sweet-tart creations. But Sacramento's

dry heat makes growing rhubarb difficult. (Photos: Kathy Morrison)

Can rhubarb flourish in Sacramento? That’s a question I pondered in earnest after killing one Victoria or Cherry Red root division after another.

In Southern California, I grew up with rhubarb and never thought twice about its care. It was a pest-free perennial that reliably reappeared each spring with sweet-tart bright red stems.

Rhubarb that's just sprouting this time of

year resembles chard. This is emerging from

a 3-year-old root division of "Glaskins Perpetual,"

one of two purchased at an American River College

plant sale in 2018. It's in a large, deep pot.
Rhubarb, like asparagus, takes
awhile to grow big enough to harvest

When I moved to Sacramento, I planted more rhubarb at our new home. The root divisions barely grew before they shriveled up their first summer and gave up all hope.

The next spring, I planted more rhubarb in a different spot. Same result; the replacements couldn’t take the summer heat.

I switched locations again and tried a shadier (and moister) spot. Those roots just rotted.

I tried planting in pots, but could never find the right balance of moisture and sun. Those rhubarb plants struggled through a few seasons before the drought dried them to dust.

Finally, I found the right spot (so far). It’s a raised bed, providing good drainage. The rhubarb is situated between blueberry bushes, which provide some afternoon shade. Rich with compost, the raised bed stays evenly moist, another important plus. Rhubarb can’t dry out, but it also hates wet feet. A soggy winter can turn the root division to mush.

At least, I think this raised bed is the right rhubarb spot; I’m anxiously awaiting the first sprouts of spring.

In my efforts to solve the rhubarb puzzle, I sought expert advice. I found that most resources (including plant breeders and seed houses) recommend growing rhubarb in USDA Zones 3-8. Sacramento is USDA Zone 9; we have too much heat.

According to Sonoma County master gardener Joe Michalek, rhubarbs prefer an average temperature under 75 degrees. It also needs some cold below 40 degrees to break dormancy.

Is easy-going rhubarb too finicky for Sacramento? Rhubarb needs more water than we get most years, even with “normal” rain; it’s not drought-tolerant. Rhubarb also needs cool weather during late spring and summer, which we rarely experience. It must be sheltered from summer afternoon sun. One local master gardener planting guide listed rhubarb as “not recommended.”

Other issues can cause rhubarb to sulk. New divisions can’t stand weeds or competition to sprouting leaves. Make sure the rhubarb’s bed is well weeded.

Bugs that like sunflowers and artichokes tend to attack rhubarb, too, so it’s advised to keep these plants far apart. With poor drainage, clay soil is problematic for rhubarb, too.

And yet, as a gardener with a nostalgic streak, rhubarb is a spring delight I insist on trying again and again. Once established, rhubarb can thrive for decades with little attention. (I know; that’s the rhubarb I remember from my family’s farm.) That’s still my goal, to grow again that carefree rhubarb of my memories.

Meanwhile, I’ll probably pick up another root division or two, just in case. There’s a spot on the patio with afternoon shade that looks like it might be perfect.

For more advice on growing rhubarb: http://sonomamg.ucanr.edu/The_Kitchen_Garden/Feature_Vegetables/Growing_Rhubarb/

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Keywords:

shade plants gardening Sacramento root divisions hot summers rhubarb winter planting soil moisture edible gardens perennials weather

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Garden Checklist for week of Oct. 6

Get ready to get to work! Cooler weather is headed our way mid-week.

* Clean up the summer vegetable garden and compost disease-free foliage.

* Harvest pumpkins and winter squash.

* October is the best month to plant trees, shrubs and perennials.

* Before planting, add a little well-aged compost and bone meal to the soil, but hold off on other fertilizers until spring. Keep the transplants well-watered (but not wet) for the first month as they become settled.

* Dig up corms and tubers of gladioli, dahlias and tuberous begonias after the foliage dies. Clean and store in a cool, dry place.

* Treat azaleas, gardenias and camellias with chelated iron if leaves are yellowing between the veins.

* Now is the time to plant seeds for many flowers directly into the garden, including cornflower, nasturtium, nigella, poppy, portulaca, sweet pea and stock.

* Plant seeds for radishes, bok choy, mustard, spinach and peas.

* Plant garlic and onions.

* Set out cool-weather bedding plants, including calendula, pansy, snapdragon, primrose and viola.

* Reseed and feed the lawn. Work on bare spots.

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