Top Questions About Pyracantha Plants

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Questions About Pyracantha Plants

Asked by
Anonymous on
June 5, 2011

Q. Brambles

I have a 30 year old Pyracantha hedge along the side of my house, which we keep nice and tidy. Over the last few years, a bramble has taken hold, the roots of which are located between the hedge and my house. I’ve tried various weed killers, but if I get some of them on the Pyracantha, it kills of the localized leaves yet doesn’t seem to do anything with the bramble. We can’t get to the roots, as they are at the back of the hedge against the house. I have been recommended to use Roundup, but I am concerned this may also kill my Pyracantha. Any ideas?

Answered by
Nikki on
June 5, 2011
Certified Expert
A.

You can use Round-up, but only in a very localized fashion. Cut the bramble back as best you can and then paint the fresh cuts with Round-up. The bramble will suck the Round-up into its roots and this will go a long way to killing the roots. You may have to repeat 2-3 times, but every time you do it, it will weaken the bramble.

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Asked by
Anonymous on
July 18, 2011

Q. Pyracantha

We have a 10-yr old pyracantha (screen hedge). It has always been vigorous with loads of flowers and berries. This year it suffered massive leaf drop, leaves yellowing before drop. There is some regrowth, but struggling with few flowers. All the leaves are very pale green and many even have cream/white colored edges and tips. All the leaves are curled inwards. There is no sign of any infestation. Two other pyracanthas alongside this ailing one have no problems at all! I am at a loss as to what is going on.

Answered by
Nikki on
July 19, 2011
Certified Expert
A.

It sounds like it could be scab. This article will help:
http://www.ca.uky.edu/agcollege/plantpathology/ext_files/PPFShtml/PPFS-OR-W-9.pdf

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Asked by
Joan on
June 11, 2013

Q. Pyracantha Bush Branches

I have a very tall pyracantha bush which is starting to lean forward. Some branches have brownish hive-looking clusters on them which are very hard. The bush itself and foliage looks very healthy. Is this some sort of disease? The bush is over 50 years old. Thank you.

Answered by
Heather on
June 17, 2013
Certified Expert
A.

If the hive looking clusters are small, like about the size of a golf ball, then they may be praying mantis egg sacs, which are good to be in the garden.

If the hive like things are actually part of the wood, it is likely galls, which are also not harmful.

If they are larger than this, then we would need to see a picture to identify them. You can attach it to this email and send it back to us.

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Asked by
jackietr on
June 14, 2014

Q. My Pyracantha shrubs are dropping so many leaves every day

The plants are getting plenty of water. Have not had this leaf drop in the previous years. I have had them planted for 2 1/2 years. They look healthy and have grown immensely but now lots of leaves are dropping every day.

Answered by
theficuswrangler on
June 16, 2014
A.

Since you don't describe the leave, I'm kind of shooting blind here, so here's an article with basic info on growing, and on the main disease that might strike pyracantha, fire blight. https://www.gardeningknowhow.com/ornamental/shrubs/firethorn/care-of-firethorn-bush.htm
Make sure that the bushes aren't getting too much water.

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Asked by
stiveshake on
May 30, 2015
Cornwall

Q. pyracantha with few flowers

Our pyracantha, or firethorn, seems to have very few flowers which always drop off before turning into berries. This has happened for about 4 years now. It grows against a fence and has sun for most of the day. A camellia growing next to it thrives. My wife is threatening to dig it up and burn it. Is there anything we can try to get it to perform better please?

Answered by
shelley on
May 30, 2015
Certified Expert
A.

Camellias thrive in acidic soil, whereas firethorn - not so much. So I think therein lies the difference - it's the soil. There are ways to modify soil to make it less acidic, as discussed in the following article:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/lower-acid-soil.htm

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Asked by
rlongsdon on
June 3, 2015
st louis, mo area

Q. how do you get starters from a Pyracanthus bush

Can you just break off a limb and put in water to start roots?

Answered by
Downtoearthdigs on
June 5, 2015
Certified Expert
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Answered by
[email protected] on
June 4, 2015
A.

soil thst is keep most is better. put several in a pot, with lowest leafs and thorns removed, then you can choose the strongest. rooting power will also help but is not nesacery.

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Asked by
Anonymous on
June 8, 2015

Q. pyracantha bush has grayish-black hive-looking lumps

My pyracantha bush has grayish-black hive-looking lumps on many branches. Shrub looks healthy but has been leaning forward and some branches weak. Could this be black knot disease? They are comprised of small round lumps all clustered together and are very hard. The bush is very old and over six ft tall. Thank you!

Answered by
Downtoearthdigs on
June 9, 2015
Certified Expert
A.

Black knot does not generally affect these shrubs, though it's not improbable. It may likely be brown scale insects, which can form clumps on branches. These can be treated with neem oil. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
https://www.gardeningknowhow.com/edible/fruits/plum/black-knot-tree-disease.htm

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