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 Greetings! This is the season of the hydrangea. Have you noticed how beautiful and full they are? All varieties - Oakleaf, Mopheads, Lacecap, Annabelle and Pee Gee. They remind me of hydrangeas you would see in the Carolinas. Every hydrangea in my yard looks better than ever. Could it have been the mild winter we had? If I had to guess I would say that is why. Most of the plants in my garden benefitted from the warmer winter but I have never seen anything as splendid as the hydrangeas this season. Exquisite!
I am not too happy with the rabbits wandering around our neighborhood. They have been munching on my coneflower and have completely devoured an entire plant (photos). Argh! It is so infuriating! When we first planted this perennial garden a year ago we fenced it in. I recently had Kevin remove the fence because I felt like the plants were more mature and I thought that with some Rabbit Scram I could control some of the munching. Well guess what? IT'S NOT WORKING!
We sure could use some rain. Why is it that any time there is rain headed our way it either breaks up or skirts us? Nothing in the forecast until early next week. The temps have been pleasantly warm and I like the fact that the humidity has been low. 90's for the weekend which won't feel too bad if it's not too humid. Summer is right around the corner - 14 days to be exact. |
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When Good Mulch Goes Bad...
It's not uncommon this time of year for Savvygardeners to have a pile of mulch delivered just to have it rained on in a big way. If you don't get that mulch covered be careful. Hardwood mulch can become a real problem if left too long in a damp pile. Not only does it smell bad once it "sours" it can adversely affect plants that it comes in contact with. Symptoms look like fertilizer or pesticide burn or water stress. Damage can be severe enough to actually kill plants - yikes! Depending on the extent of the injury, plants are often able to recover. Savvygardeners should water affected plants during hot, dry periods to prevent further stress.
Mulch that has soured can still be used if it is "mellowed" before application. Simply spread the mulch in shallow layers and allow it to air out for several days until it no longer smells.
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Is That A Volcano In Your Garden?
Speaking of mulch... When mulching try to avoid creating "mulch volcanoes" at the base of your trees. Unfortunately it is quite common to see trees mulched in this manner - a ring of mulch that gets progressively deeper as it approaches the trunk. While this is better than no mulch at all the University of Missouri Extension advises us that there are some real problems to consider:
- When mulch is placed more than about 4 inches deep, roots tend to "migrate" up into the mulch during rainy periods or when the area is irrigated. Then, when drought conditions occur, the plant may come under severe stress because many of its roots are growing in a material with much less water holding capacity than real soil.
- The surfaces of the mulch volcanoes can become hydrophobic due to fungal activity and will act as very effective umbrellas, shedding water to the surrounding turf. This could easily kill a young tree by depriving it of much needed water.
- Other possible problems with mulch volcanoes are promotion of fungal canker diseases by constant moisture around the lower trunk, stress from poor gas exchange by the cells in the bark and damage from rodents that may take up residence in the volcano.
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Black Spot On Roses...
A common disease of roses is blackspot, a fungal disease that can cause defoliation of susceptible plants. Look for dark, circular lesions with feathery edges on the top surface of the leaves and raised purple spots on young canes. Infected leaves will often yellow between spots and eventually drop. The infection usually starts on the lower leaves and works its way up the plant. Blackspot is most severe under conditions of high relative humidity (>85%), warm temperatures (75° to 85° F) and six or more hours of leaf wetness. Newly expanding leaves are most vulnerable to infection. The fungus can survive on fallen leaves or canes and is disseminated primarily by splashing water.
Cultural practices are the first line of defense.
- Don't plant susceptible roses unless you are willing to use fungicide sprays. Follow this link for a list of blackspot resistant varieties.
- Keep irrigation water off the foliage. Drip irrigation works best with roses.
- Plant roses in sunny areas with good air movement to limit the amount of time the foliage is wet.
- Remove diseased leaves that have fallen and prune out infected rose canes to minimize inoculum.
If needed, gardeners can protect foliage with a regular spray program of effective fungicides. Recommended fungicides include tebuconazole (Bayer Disease Control for Roses, Flowers and Shrubs), myclobutanil (Immunox), triforine (Funginex), thiophanate methyl (Fertilome Halt) and chlorothalonil (Broad Spectrum Fungicide, Garden Disease Control.
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Minimize Mosquitoes...
One of our least favorite parts of summer is the arrival (or re-emergence) of mosquitoes. This year is no exception. Eliminating sources of standing water is the most effective way of keeping mosquito populations in check but it is sometimes impractical for gardeners. Here are some good tips for dealing with standing water that can't be removed.
- Drain or empty the water in dog bowls, wading pools and birdbaths at least once-a-week. This will ensure egg-stage mosquitoes never have time to reach maturity.
- Irrigate lawns and gardens carefully. Where soils have high clay content, for example, irrigating slowly or irrigating several times lightly will allow the clay to absorb the water, rather than causing puddles and runoff.
- Stock ornamental ponds with mosquito larvae-eating fish, such as goldfish.
- Remove in-water plants from the edges of garden ponds to allow fish access to the larvae living and developing there.
- Using a retail product to control mosquito larvae will be more effective and less costly than trying to control the flying adults.
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Fruit Dropping, Branch Propping...
Don't be alarmed if tree fruit is dropping this time of year. It's just Mother nature's natural thinning process designed to prevent excessive loads. Just in case the branch loads remain too heavy you should thin remaining fruit by hand or prop up heavy branches to avoid breakage. Most fruit should be spaced 6 to 8 inches apart on a branch.
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Taxing Time For Turf...
The next few months will likely be very taxing for your fescue or bluegrass lawn. Long, hot and humid days, with little rainfall can make even the greenest lawns wilt. While it's probably not possible to keep your turf looking perfectly lush and green all summer you can prepare it for the heat by raising the cutting height of your mower. Fescues and bluegrass should be cut at a height of 3 to 3½ inches. Determine your mowing frequency by cutting no more than one-third of the blade height with each cutting. This means cutting when it reaches 4½ inches or so.
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Finally...
"On every stem, on every leaf,... and at the root of everything that grew, was a professional specialist in the shape of grub, caterpillar, aphis, or other expert, whose business it was to devour that particular part."
~ Oliver Wendell Holmes
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