Hydrangeas forum: Need advice

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Name: emily
Calgary, Alberta (Zone 4a)
Image
etl75
Aug 18, 2015 1:11 PM CST
Thumb of 2015-08-18/etl75/b5f3b2
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Pls help guys dont what's happening to them now, they are hydrangea paniculatas and aborescens looks like they got burned from 31 degrees we had last week 😔
Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Aug 18, 2015 5:17 PM CST
31 degrees F or C? Ouch. The flowers can burn with all day sun in either of those temps. Are these recent plantings? Seems like the plant in the middle of pic #2 might have something else going on with it since there aren't a lot of leaves on it.
Name: emily
Calgary, Alberta (Zone 4a)
Image
etl75
Aug 18, 2015 6:26 PM CST
Ya I'm not sure if that is natural dying or lack of fertilizer or over , I just planted them all in May though the 2 incredibles bloomed earlier than paniculatas.
Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Aug 19, 2015 8:06 AM CST
While the leaves don't look like they're wilting, newly planted hydrangeas need plenty of moisture until the roots get established. I wouldn't fertilize the first year but if you have some compost, you could top-dress with that (under the mulch). Keep an eye on your plants when using dyed mulches. You can also trim off the brown flower heads and let the plant energy go back into establishing some new leaves and a stronger plant.
Hurst, TX (Zone 8a)
luis_pr
Aug 19, 2015 6:13 PM CST
Hello, etl75. I am not sure I would be too worried. If the leaves are browning from the edges inwards, the shrubs need more soil moisture. But it is a little more harder to tell for sure about the blooms. At this time of the year, they tend to be mature and will begin a progression of color changes that ends in brown.

The blooms can also turn brown early if the plant aborts them due to lack of soil moisture. Hydrangeas, if exposed to soil moisture issues, will first abort flower buds then blooms and-or flowers. A lot of sunlight and high temperatures will increase the chances of browning but 31-degrees C should not be high enough to cause that problem which makes me wonder if the blooms are spent (mature).

My Little Lime and some nearby Vanilla Strawberry Paniculatas are known to get some browning on the sepals due to my daily 100-degree F (38-degree Celcius) temperatures at the end of August. Some paniculata varieties like Limelight and Little Lime, for example, are notorius for dropping leaves and "showing their legs" by the end of the growing season.

Arborescens can also loose leaves as some varieties do poorly in hot locations (especially the ones whose leaves are grayish or silver underneath). Annabelle, its cousins Incredibelle and Invincibelle Spirit I and II & the species are more heat tolerant but may still drop leaves if exposed to a "dryness". And yes, all Smooth Hydrangeas will begin changing the color of the blooms at around this time of the year.

Do consider that these were planted only months ago so transplant shock is always a problem and will act in unusual ways on their first year (bloom earlier or later than normal, etc) and especially in their first summer.

Luis
[Last edited by luis_pr - Aug 19, 2015 6:17 PM (+)]
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Name: emily
Calgary, Alberta (Zone 4a)
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etl75
Aug 20, 2015 12:03 AM CST
Thanks luis_pr for the info and yes they incredible flowers were already mature from color white they started to green hopefully they comeback nxt year!😀
Hurst, TX (Zone 8a)
luis_pr
Aug 21, 2015 10:32 PM CST
They are quite large, aren't they?!?!

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