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Hydrangeas failed to Bloom

Posted by chas045 7b (My Page) on
Sat, Jul 12, 14 at 15:53

I have a nice established row of mophead and lace cap hydrangeas that were planted eight years ago on the North-East side of our garage. They had bloomed every year and for the last two years the display was wonderful. I felt like having Scarlett and Rhett over for Tea. Last fall, like almost every fall, I have cut off the dead flower heads and stuffed them (along with some pine needles and other convenient mulchy stuff) down around the remaining branches for a small degree of winter protection.

There are almost no blooms on the plants this year but otherwise the plants are growing very well. Obviously, we had an unusually cold winter. Our temps. dropped to four and three degrees F on the coldest nights while previous year lows were probably 15 to 10 degrees F. I assume the extra cold is responsible for the bloom failure but I have looked online and it appears that the general consensus is that cold down to zero requires no protection at all.

The web info did suggest that a late freeze after budding out was a common cause for failure. I don't recall that we actually had a very late freeze although it was certainly late enough to kill my peach and plum fruit as often happens. Have you all had similar problems? And is Tomorrow just Another Day?


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RE: Hydrangeas failed to Bloom

  • Posted by lsst 7b (My Page) on
    Sun, Jul 13, 14 at 17:45

All my hydrangeas did the same thing. I have counted maybe 5 blooms total this year.

Like your hydrangeas, last years blooms were spectacular.

I assume the harsh winter is responsible.

What is bothering me most is that my Endless Summers are not trying to bloom on new wood as advertised. I expected them to bloom even if my heirloom mop heads that bloom on old wood only did not.


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RE: Hydrangeas failed to Bloom

The blame goes to the horrible winter we had last year. Same thing with our mopheads; just a few blooms that the cold didn't kill off. Some hydrangeas bloom on the previous year's wood and when a bad winter comes along, it kills off the woody stems, hence no blooms or very little.


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RE: Hydrangeas failed to Bloom

Almost all of mine failed to bloom. I know it's the winter, but they bloom in zone 5. Also most of mine are Endless Summer that bloom on new wood. Very frustrating.


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RE: Hydrangeas failed to Bloom

The mopheads failed to bloom because they bloom on old wood; my paniculatas and serratas did fine; these bloom on new wood. Next year everything should be back to normal. Some even bloom on old and new wood! Some of mine didn't bloom because they are grown from cuttings and need time (about 3 years) before blooming. I did miss seeing my mopheads.


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RE: Hydrangeas failed to Bloom

My Endless Summers are finally covered with tiny immature buds.
I hope the buds will bloom before the first hard freeze.


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RE: Hydrangeas failed to Bloom

Yes, the Endless Summers do have tiny buds now...way too late. I wonder what the company would say about this. I sell them at Lowes and will be getting questions I'm sure. New wood should always produce blossoms in my book.

Now some of mind also have BLACK SPOT.


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