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Mulch is good, and more mulch is better

Don't let the sun cook your plants' roots

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104 -- and not yet the peak of the heat.
(Photos: Kathy Morrison)
It's June 4 and it's going to be at least 100 degrees again this afternoon. Do you know where your mulch is?
I bought more straw this morning after I took a soil thermometer out into my rapidly heating backyard Wednesday afternoon. The air temperature at 2:15 p.m. was 99 degrees, according to my cellphone's weather app, and the wall thermometer in the shade in the garden itself read 98. So it already was plenty hot.
I stuck the soil thermometer into the top inch of a non-mulched spot next to a basil plant in my raised bed, which at that point was in full sun (and had been for several hours).
The thermometer popped up to 104 degrees -- in the area on the thermometer helpfully labeled "MAX."
I pushed the thermometer down several inches in the same spot; the number dropped to 97 degrees. Still quite hot, but better.  Next I tried a shady area in the same raised bed: 82 degrees, in the optimal range. So my goal is to bump up the mulch here, and keep those plant roots in the optimal range. The cooking can happen later, in the kitchen.
A few other gardening notes on this early June day:
-- Harvest Day this year will be virtual, because of the coronavirus risk. This is a big event held the first Saturday in August at the Fair Oaks Horticulture Center. The UCCE Sacramento County master gardeners typically show off their demonstration gardens in a festive atmosphere. This year, the master gardeners will have a collection of videos highlighting their various areas. There will be a lot more information coming as we get closer to August. One good thing: The videos will allow folks who've never been able to attend Harvest Day to "visit" the Hort Center.
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Squash plants, hanging in there. They'll get more
mulch.
-- Keep a close eye on your vegetable plants. With this heat, all the nasty things that can happen to them are being exacerbated. Bugs! Wilting! Fungus! Pollination problems! But remember: Don't overwater; don't feed a plant that's wilting; keep some shade cloth handy for the plants suffering most. Oh, and mulch!

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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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