Master gardeners tackle problems from fertilizer to flea beetles
Cotton, foreground, and grapes are among several crops growing at The Farm at Cal Expo during the State Fair. The master gardeners' booth is nearby. Kathy Morrison
The first question of the morning was pretty easy: What is that unlabeled crop growing beyond the bush beans?
The three master gardeners on the shift, including myself, took turns going to look. The plants were about 2 feet tall, with bright green maple-like leaves and just the barest hint of a bud forming. Hmm, not a food crop. A plant ID app helped answer the question: American cotton, which of course is a big crop in California's southern San Joaquin Valley. We later spotted a gorgeous early flower underneath all the foliage: This area will be stunning in a few weeks, but likely after the fair is over, alas.
Why the plants weren't labeled is unknown, since each vegetable is well-identified on at least one border of its growing area. That lack of ID for cotton was one of the few missteps apparent in The Farm at the State Fair, which is looking better this year than even last year, and exponentially better than two years ago. The area is being regularly weeded, and the produce picked when it's ready -- no zucchinis that resemble small logs, for instance. The blighted fruit trees noticed in 2022 have been removed. The bush beans look so healthy, the tomatoes lush, the corn tall and full.
The Sacramento County master gardeners have absolutely nothing to do with planning, planting or weeding The Farm, but care about it just the same. For the run of the fair, they field questions from fairgoers from a booth smack in the middle of those demonstration crops, so naturally folks have questions about them. The crops also serve as visuals -- "Come look at this," we'll say.
This year, many of the questions on one weekday required the same four-letter answer: HEAT. The extreme weather has played havoc with plant development, flower production and especially pollination in gardens large and small.
Working up to an answer requires master gardeners to ask questions in return: How much sun is the area getting? Shade? When were the plants put in the garden? How and how often are they watered? Fertilized? Raised beds or containers or in ground? Are there bees evident in the garden?
One couple seemed to be doing everything right, but still weren't getting fruit forming on squash or tomato plants. This was even before the recent heat wave, they said. They knew, for example, how to hand-pollinate squashes. One more question: Is the area mulched? No! That would keep the roots cooler and prevent plant stress, which often interferes with pollination. Recommendation: Mulch the garden with compost or straw or shredded bark, and be patient while the plants readjust after the heat wave. And hold off on the fertilizer until temps are closer to normal for their community. (That looks to be after July 25.)
Another veteran gardener was having trouble with flea beetles in his tomatoes. Not a problem I've run across in 30 years of growing tomatoes; apparently the pest is more common in eggplants. He was given the link to the excellent UC Integrated Pest Management website for possible solutions.
Spider mites, overloaded/broken fruit trees, bindweed in lawns, recalcitrant heirloom tomatoes, diseased table grapes and the heartbreak of bitter cucumbers were all topics brought up during this one shift. It's the time of year when gardeners expect to reap the rewards of spring work. Mitigation ideas for this year plus suggestions for next year (example: try one of the new cucumber hybrids) ease the disappointment. Sharing master gardeners' own failures often helps gardeners feel better: They're not alone!
Sacramento County gardeners who can't get to the State Fair to ask questions in person can call or send an email to the office: (916) 876-5338 or mgsacramento@ucanr.edu. Harvest Day (Aug. 3) and the fall Open Garden Days (Sept. 14 and Oct. 16) at the Fair Oaks Horticulture Center offer additional in-person opportunities for all.
The California State Fair continues through July 28 at Cal Expo. Gates open at 11 a.m. Monday through Thursday; 10 a.m. Friday through Sunday. Master gardeners are most likely to be staffing the booth in the first three hours of the fair's day; temperatures above 105 degrees force closure of the booth, which has fans and shades but not air conditioning.
For more information on the State Fair: https://calexpostatefair.com/info/faq/ Information on Sacramento County master gardener activities: https://sacmg.ucanr.edu/
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Flowers in My Back Yard Series
June 2: Sunflowers capture Sacramento's summer attitude
May 29: Are your roses going 'blind'?
May 26: Zinnias are the summer flowers every garden needs
May 19: Plant dahlias now for late-summer flower power
May 12: Know your coreopsis from your bidens
May 5: Mums the word on Mother's Day weekend
April 28: Majestic Matilija poppy is worth a look
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 June 7
Afternoon highs are expected to be back in the mid 90s by midweek, then edging towards triple digits. Plan your planting and garden activities accordingly.
* Remember to water early.
* It’s not too late to transplant tomatoes, peppers, eggplant or other summer favorites. Make sure they stay hydrated.
* 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.
* Let the grass grow longer. Set the mower blades high to reduce stress on your lawn during summer heat. To cut down on evaporation, water your lawn deeply during the wee hours of the morning, between 2 and 8 a.m.
* 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.
* 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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Food in My Back Yard (FIMBY) Series
Lessons learned during a year of edible gardening
WINTER
Is edible gardening possible indoors?
Hints for choosing tomato seeds
Why winter is the perfect time to plant fruit trees
When to plant? Consider staggering your transplants
How to squeeze more food into less space
Plant a fruit tree now -- for later
Win the weed war by tackling them in winter
Tips for planting bare-root trees, shrubs and vegetables
Time to give vegetable seedlings some more space
Ways to win the fight against weeds
FALL
Dec. 16: Add asparagus to your edible garden
Dec. 9: Soggy soil and what to do about it
Dec. 2: Plant artichokes now; enjoy for years to come
Nov. 25: It's late November, and your peach tree needs spraying
Nov. 18: What to do with all those fallen leaves?
Nov. 11: Prepare now for colder weather in the edible garden
Nov. 4: Plant a pea patch for you and your garden
Oct. 27: As citrus season begins, advice for backyard growers
Oct. 20: Change is in the autumn air
Oct. 13: We don't talk (enough) about beets
Oct. 6: Fava beans do double duty
Sept. 30: Seeds or transplants for cool-season veggies?
Sept. 23: How to prolong the fall tomato harvest
SUMMER
Sept. 16: Time to shut it down?
Sept. 9: How to get the most out of your pumpkin patch
Sept. 2: Summer-to-fall transition time for evaluation, planning
Aug. 26: To pick or not to pick those tomatoes?
Aug. 19: Put worms to work for you
Aug. 12: Grow food while saving water
Aug. 5: Enhance your food with edible flowers
July 29: Why won't my tomatoes turn red?
July 22: A squash plant has mosaic virus, and it's not pretty
July 15: Does this plant need water?
July 8: Tear out that sad plant or baby it? Midsummer decisions
July 1: How to grow summer salad greens
June 24: Weird stuff that's perfectly normal
SPRING
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
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