Beetles and Blights and Black Spot, Oh My!
Greetings!
 The Japanese beetles are ravaging my roses. The lower leaves of the tomatoes seem to be sporting an intriguing combo of leaf curl, early blight, and perhaps septoria spot. And I've just noticed in the lawn the annual late-summer assortment of odd beige patches. Ah, summer. Time to kick back and watch the garden get ravaged by pests and diseases. In fact, I'm kinda-sorta serious. If you're fretting about your lawn not being perfect, or your roses struggling, or the death of the green beans that never could grow faster than the rabbits could eat them, at the end of the day, just pour yourself a stiff drink and forget about it. We're fortunate to live in an era where we don't have to rely on the bounty of our gardens. In my book, the best thing you can do to control pests and diseases is just be tolerant. Practice general good garden care (soil improvement, weeding, mulching, watering) and smart plant choice (nothing fussy or poorly suited to our Iowa climate) and then, well, let 'er rip. Nature is far more powerful than I am, so I figure if those Japanese beetles want my roses that bad, they can have 'em. It's too much work and would involve too many chemicals to eliminate them. Or the leaf curl. Or the early blight. Or anything else. Of course, many would disagree with me. And that's the wonderful thing about gardening. There's seldom an absolutely right--or wrong--way to do it. Happy Gardening!  Veronica Lorson Fowler |
Tomato Trouble
We've been getting lots of questions about different problems with tomato diseases. The truth is tomatoes are highly, highly susceptible to a variety of pests and diseases in our moist, humid climate. No tomato in Iowa survives the summer without at least a touch of fungal disease, especially on the lower leaves. With fungal diseases, the best offense is a good defense. Click here for Five Simple Steps to Healthier Tomatoes. It will be of limited use now, but will set you up for better luck next year.
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The Fungus Among Us
Most of the diseases occurring right now on tomatoes and so many other plants--spots and shriveling and curling leaves--are the result of fungal problems. Fungal diseases are tricky because they really need to be treated before they show up. That means trying to predict in spring what plants in later summer will develop fungal problems. Actually, it's pretty easy: Tomatoes, roses, bee-balm, lilacs, and members of the squash family always seem to have fungal problems in our climate by now. Keep an eye out for other plants in your garden that consistently get fungal diseases: Black spot, other spots, and powdery mildew. The one kind of "spraying" I do fairly religiously in my garden is an organic, homemade spray of 2 quarts water, 2 tablespoons baking soda, and 1 tablespoon liquid hand soap. I spray it in April and May on plants that are prone to fungal disease. Spray before daytime temperatures regularly hit 80 degrees. And then repeat spraying three to five times over the course of a month or so, a few days apart each time. (And never right before a rain.) I could also use a commercial fungicide, but they tend to have copper and other chemicals that worry me. Commercial fungicides also can be used now, even after fungal problems show up, but they have far more limited effectiveness at this point in the game.
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Wild at Heart
I've been loving hikes this time of year. The prairie wildflowers, especially, are in their glory. I like the challenge of trying to identify them, which drives my kids nutters. "Mom! You don't have to stop and point out every single flower!" (Oh, but I'd love to try.) If you like identifying Iowa wildflowers, too, click here for a nifty web site that will help you identify various Iowa native plants.
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Bugged by Japanese Beetles
What a bummer. It used to be that Japanese beetles were something only gardeners in the eastern U.S. had to deal with. They listened with envy (especially rose growers) when we Iowans told them this hungry insect didn't exist here. But over the last decade, Japanese beetles been showing up, and this year in my garden, they've gone crazy. Pity. They're beautiful, all shiny black and metalic green with a fascinating row of white spots along their backsides. But they munch big ragged holes in my roses and when I was picking raspberries, I had to knock them off just to get my fair share. The frustrating thing is that there is no sure-fire way to eliminate Japanese beetles, but click here for an Iowa State link discussing some limited control methods.
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Get a Free Child Admission to the Des Moines Botanical Center!
Forward this email to a friend, and you'll be automatically emailed a coupon for one free child admission to the Des Moines Botanical Center (when accompanied by an adult). Click here to forward to a friend and then you will to be emailed the coupon. They'll also receive a coupon as a thank you for signing up.
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Ask Veronica a Question
If you're a subscriber, email Veronica with your garden questions and she'll do her very best to get back to you within two business days. Click here! |
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Garden To-Do List
Harvest early and often for the most tender, sweetest produce and to keep plants producing well. Click here for information on a plant-by-plant breakdown on how to tell when it's time to harvest.
Weed, weed, weed! After weeding, mulch to prevent weeds from returning.
You can divide perennials that bloom in the spring now, as needed or desired. Cut them back hard and keep well-watered after transplanting. Hold off on dividing those that bloom in late summer or fall. For them, it's too close to show time! Deadhead flowers on annuals, perennials, and some shrubs. It keeps your garden more attractive and in many cases, it will encourage more flowers longer.
Continue to plant container-grown or balled-and-burlapped trees, shrubs, and roses now. But do so with caution. This late in the year, it's best to do it during a spell of cooler, wetter weather. If nothing else, be really diligent about keeping it watered.
Remove old raspberry canes after the plants stop producing fruit
Check out the bulb catalogs and on-line sources. Ordering now assures the type and quantity you want this fall, when supplies run low.
Frustrated by moles? Click here to check out ways to control them.
Check out our month-by-month listing of what to plant when in Iowa!
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Garden Events Reiman Gardens Gift Shop In the Heat of the Night Sale Thursday, August 6, 2009 5:00-8:00 PM. Shop Reiman Gardens for items with sustainability in mind, for the gardening enthusiast, and for gifts inspired by nature.
Brown Bag Lecture Reiman Gardens
Thursday, August 13 Noon. Bring your lunch to the Gardens and enjoy "Why I Love Gardening" presented by Marsha Leeper, Garden Gate Magazine. Price of admission for general public. 515-294-2710.
End of Season Plant Sale Iowa Arboretum Saturday, August 29 9:00-noon Huge sale. Cleaning out greenhouse. Best prices of 2009.
Click here to include your group's event in this listing at no charge!
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Quote:
"Coffee. Garden. Coffee. Does a good morning need anything else?"
-- Betsy Caņas Garmon
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Slowing Down
The garden this time of year is slowing down and so are we. The Iowa Gardener has been coming out every other week during the heaviest part of the growing season, but now until spring, we're knocking back to once a month. Still the same great local garden information, just a little less often.
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