Tips to help keep gardeners, gardens more comfortable in triple-digit weather
A shade cloth (or burlap or a lace tablecloth) hung on a tomato cage can protect developing fruit from sunburn during a heat emergency. Kathy Morrison
Are you ready for 109 degrees?
That’s the forecasted high for Sacramento on Saturday, says the National Weather Service. And that won’t be the only super-hot day. The Sacramento region will be under “Excessive Heat Watch” from 11 a.m. Friday through 8 p.m. Monday.
“Widespread MAJOR Heat Risk will impact our area this weekend,” tweeted the NWS Sacramento office on Tuesday. “This heat will be dangerous to anyone without proper hydration and cooling. Reconsider outdoor plans and if you must go outside, take frequent breaks in the shade and drink plenty of water.”
According to the NWS, the Sacramento region can expect “dangerously hot conditions with daytime high temperatures 98 to 113 with overnight lows in the upper 60s to low 80s possible.”
The heat watch includes a wide area: “Sacramento Valley, Northern San Joaquin Valley, Motherlode, Northeast Foothills, Burney Basin, Coastal Range, Delta, Shasta County Mountains, and portions of the West Slope Northern Sierra Nevada and Lassen/Western Plumas Counties for elevations below 4,500 feet.”
So even retreating up into the Sierra won’t bring much relief.
While people (and pets) can retreat indoors, our plants aren’t so lucky. Before Friday, make a point to deep water perennials, shrubs and trees.
Move potted plants into partial shade if possible. Containerized gardens may need daily watering during this heat wave.
Don’t let tomatoes, squash, peppers and other developing fruit dry out completely; that can lead to blossom end rot and other problems.
Here are more hot weather survival tips for gardeners and gardens:
* Stay hydrated! That applies to both you and your garden. Water early in the day – before 8 a.m. if possible – to cut down on evaporation.
* Cycle and soak. Water needs a chance to soak in, especially if you have clay soil. Otherwise, it will run off (and down the drain) instead of reaching roots. Run your irrigation for a short period. Wait an hour or two. Then, run your system again. The water from the second cycle will reach deeper than the first.
* Mulch, mulch, mulch! A layer of 3 inches of straw, wood chips, dried leaves or other organic material will keep soil and roots cooler while conserving moisture.
* Shade any sensitive plants and developing fruit on tomatoes, peppers, eggplant and squash. Your harvest can get sunburned. Protect from intense afternoon rays with temporary shade such as burlap draped over trellises.
* Wilting can be normal. Some big-leafed plants such as squash may seem to wilt every hot afternoon; that’s OK. They recover overnight. It’s when they’re still wilted in the morning that it’s a problem.
* Check the soil before you water. It may look dry on top, but still have enough moisture in the root zone 6 inches below the surface. Plants can suffer from too much water (especially in containers) as well as not enough.
Heat is often on the minds behind Sacramento Digs Gardening. Here are links to several past columns with heat-related advice:
-- Get Ready for Hot Days Ahead
-- Mulch is Good, and More Mulch is Better
-- 5 Hacks for Shading Your Precious Vegetables
-- Hot Tomato! How to Help Your Vines During High Heat
-- Speaking for the Trees: Don't Forget Them in This Heat
-- For Best Roses in Heat, Watch Water and Mites
And if you’re too late:
-- Rescuing a Heat-Stressed Plant
Finally, for the gardener:
--- Too Hot to Think? Follow These Tips
– Debbie Arrington and Kathy Morrison
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Food in My Back Yard Series
June 17: Help pollinators help your garden
June 10: Battling early-season tomato pests
June 3: Make your own compost
May 27: Where are the bees when you need them?
May 20: How to help tomatoes thrive on hot days
May 13: Your plants can tell you more than any calendar can
May 6: Maintain soil moisture with mulch for garden success
April 29: What's (already) wrong with my tomato plants?
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
Feb. 25: Plant a fruit tree now -- for later
Feb. 18: How to squeeze more food into less space
Feb. 11: When to plant? Consider staggering your transplants
Feb. 4: Starting in seed starting
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Garden Checklist for week of June 22
Mornings this first week of summer will remain comfortably cool – just right for gardening!
* Water early in the morning to cut down on evaporation. Check soil moisture and deep water trees and shrubs. Keep new transplants and veggies evenly moist. Deep water tomatoes to encourage deep roots.
* From seed, plant corn, melons, pumpkins, radishes, squash and sunflowers.
* Plant basil to go with your tomatoes.
* Transplant summer annuals such as petunias, marigolds and zinnias. It’s also a good time to transplant perennial flowers including astilbe, columbine, coneflowers, coreopsis, dahlias, rudbeckia, salvia and verbena.
* Tie up vines and stake tall plants such as gladiolus and lilies. That gives their heavy flowers some support.
* Dig and divide crowded bulbs after the tops have died down.
* Feed summer flowers with a slow-release fertilizer.
* Mulch, mulch, mulch! This “blanket” keeps moisture in the soil longer and helps your plants cope during hot weather.
* Avoid pot “hot feet.” Place a 1-inch-thick board under container plants sitting on pavement. This little cushion helps insulate them from radiated heat.
* Thin grapes on the vine for bigger, better clusters later this summer.
* Cut back fruit-bearing canes on berries.
* Feed camellias, azaleas and other acid-loving plants. Mulch to conserve moisture and reduce heat stress.
* Cut back Shasta daisies after flowering to encourage a second bloom in the fall.
* Trim off dead flowers from rose bushes to keep them blooming through the summer. Roses also benefit from deep watering and feeding now. A top dressing of aged compost will keep them happy. It feeds as well as keeps roots moist.
* Pinch back chrysanthemums for bushier plants with many more flowers in September.
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