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What to do about brown camellias


Already damaged by wind, this Debutante camellia shows first signs of petal blight: Tiny brown specks.
(Photos: Debbie Arrington)
On eve of Sacramento Camellia Show, petal blight a common problem



This has been a challenging camellia season in the Camellia City.

As growers prepare for this weekend’s
95th annual Sacramento Camellia Show , they’ve had to deal with plenty of stormy weather. This week, an atmospheric river dumped more than 3 inches of rain, including a record 2.52 inches Tuesday.

“Rain is not as bad as wind,” said Julie Vierra, president of the Camellia Society of Sacramento. “Wind hits (the flowers) and bruises them all up. Rain tends to cause more blossom rot.”

So much moisture also brings out camellia petal blight (Ciborinia camelliae Kohn), the bane of camellia growers. This fungal disease, which only attacks camellia flowers, can quickly turn pretty blooms into mushy brown wads. The infection starts as tiny brown specks, but those spots enlarge rapidly in the right conditions. Petal blight needs a period of cold, followed by warmer, wet days; recent weather has been ideal for massive outbreaks.

The infected flowers fall to the ground, where the fungus can stay dormant for up to five years.

To help control petal blight, pick up fallen
blooms around any camellia bush.
“Pick up fallen blooms,” Vierra said. “Pick up your neighbors, too. You’ve got to get them out of there. That stuff spreads like wildfire.”

Don’t compost infected camellia blooms; dispose of them in the garbage.

Petal blight spores can be spread short distances by wind. According to the American Camellia Society, fungicides are mostly ineffective in its control. Instead, constant clean-up of infected flowers can help contain its impact.

“Pull off browned blossoms,” Vierra said. “Keep bushes clean.”

Although amateur growers are encouraged to enter flowers for Saturday morning’s judging, don’t bring any with brown spots, Vierra warned. The fungus can spread to other flowers on display.

“We won’t accept browned or infected flowers,” she said. “We’ll throw them right in the trash.”

For more on petal blight, visit www.americancamellas.com . For more on the 95th annual Sacramento Camellia Show: www.camelliasocietyofsacramento.org .

Petal blight can turn a camellia into brown mush.

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Garden checklist for week of June 14

We'll be back to normal temperatures for mid-June (about 86 degrees) by Thursday. In the meanwhile:

* 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 early 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.

* 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.

* Warm weather brings rapid growth in the vegetable garden, with tomatoes and squash enjoying the heat. Deep-water, then feed with a balanced fertilizer. Bone meal can spur the bloom cycle and help set fruit.

* Generally, tomatoes need deep watering two to three times a week, but don't let them dry out completely. That can encourage blossom-end rot.

* 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.

* From seed, plant corn, pumpkins, radishes, squash and sunflowers.

* Plant basil to go with your tomatoes. There’s still time to plant melons, pumpkins and squash from seed.

* Transplant summer annuals such as petunias, marigolds and zinnias. It’s also a good time to transplant perennial flowers including astilbe, bidens, columbine, coneflowers, coreopsis, dahlias, rudbeckia, salvia and verbena.

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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

Starting in seed starting

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

Potatoes from the garden

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