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- Q.False Spirea Containment - Hello, I read your article on growing false spirea as I had planted one last year and just now noticed ...
- Q.Can I Dig Up A Spirea And Divide Into Two Separate Plants - The exisiting spirea is large (width wise) and I would like to separate and have two new plants
- Q.Planting Spirea In Hard Clay - Our soil is extremely hard clay. Doesn't drain well. It is difficult to amend a large area of soil, due ...
- Q.What Could Be The Cause Of The Discoloration On My Spirea Shrubs? - I have several mature spirea shrubs that form a hedge around my patio. Most of them look healthy, but a ...
- Q.Spirea Shrubs Are Dying - We have several spirea shrubs that we planted over 20 years ago. This year one by one their leaves began ...
- Q.I Have 60 Spirea That Are Not Blooming. Cm - They are on my property line. The first few years they were beautiful, but the last couple years they have ...
- Q.I Have Planted Two Spirea Plants One Is Growing Normally The Other Is Growing Horizontal With The Ground. What Is The Best Way To - I would just like to know how to correct this growing pattern?
Asked by
Anonymous on
April 6, 2022Q.False Spirea Containment
Hello, I read your article on growing false spirea as I had planted one last year and just now noticed the suckering.. it's spreading fast! It is planted in a large raised bed in the centre of my front lawn, which is composed of deep landscape bricks so I'd estimate about half a foot tall. My question is will the suckering be contained within the raised bed, or is it going to sucker right under the bed and end up in my lawn?
Answered by
GKH_Susan on
April 7, 2022
Certified ExpertA.You can stop the spread by pulling up the suckers as you see them. You also can cut it to the ground every year. If you don't, I'm sure they will manage to sucker under the bricks.
https://www.gardeningknowhow.com/ornamental/shrubs/false-spirea/how-to-grow-false-spirea.htmWas this answer useful?00
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- Asked by
m.alberts on
April 28, 2022Q.Can I Dig Up A Spirea And Divide Into Two Separate Plants
The exisiting spirea is large (width wise) and I would like to separate and have two new plants
- Answered by
BushDoctor on
April 28, 2022
Certified ExpertA.As long as you can get roots and shoots on all divisions, then this is a great way to make extra shrubs! Just take a large knife, saw, or hatchet and make sure that it is clean before dividing it. Then follow these transplanting instructions:
https://www.gardeningknowhow.com/ornamental/shrubs/spirea/how-to-transplant-spirea.htm
Was this answer useful?00 - Asked by
Anonymous on
July 12, 2022Q.Planting Spirea In Hard Clay
Our soil is extremely hard clay. Doesn't drain well. It is difficult to amend a large area of soil, due to underground utilities and irrigation. Can we grow them in raised beds, and if so, how deep mut the raised bed be. Thank you
- Answered by
GKH_Susan on
July 21, 2022
Certified ExpertA.You can grow them in large containers or in raised beds. You can also create a berm, or slight hill, to plant them. Here is more:
https://www.gardeningknowhow.com/special/spaces/building-a-berm-how-do-i-make-a-berm.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/making-unframed-raised-beds.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/raised-bed-soil-depth.htm
Was this answer useful?00 - Asked by
native_species on
August 26, 2022
6Q.What Could Be The Cause Of The Discoloration On My Spirea Shrubs?
I have several mature spirea shrubs that form a hedge around my patio. Most of them look healthy, but a few at the end of the hedge have turned pale green this summer with orange discoloration and dark red/purple spots. I had a tree and shrub specialist out to look at it, and he doesn't know what it is. I also looked up common problems with spirea and none of the issues described seem to match what's going on here. I included photos of the affected shrubs and the healthy ones right next to them.
- Answered by
BushDoctor on
August 29, 2022
Certified ExpertA.This one is tricky...
I would check the pH and nutrient content of that specific area around that shrub. I see this, sometimes, where a plant is a little more hungry than the rest in an area. This can cause deficiencies in one spot, or pH imbalances.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
Otherwise, here are some articles that will offer care tips and more information on the shrub:
Was this answer useful?10 - Asked by
Anonymous on
August 22, 2023Q.Spirea Shrubs Are Dying
We have several spirea shrubs that we planted over 20 years ago. This year one by one their leaves began to turn, dry up, die and fall off. Now every shrub is dying. I treated them with Neem oil but it did not help. I do not see black or scorched spots on the stems, so I don’t think it is fire blight. Could it be Verticillium Wilt? We need to know so we don’t infect any future scrubs we replace them with. We trim these shrubs annually so the second pic does show some of that old growth (gray stems) so you don’t get confused between it and this year’s growth.
- Answered by
GKH_Susan on
August 22, 2023
Certified ExpertA.To be on the safe side, don't replace these with more spireas, plant a different kind of shrub to lessen the chance of repeating the problem.
It could be verticillium wilt. This article tells you how to determine if it is by examining the inside of the stems. If it isn't wilt, check for spider mites. Prune back the damage and see if that helps. Also you can try a miticide since Neem oil didn't help.
https://www.gardeningknowhow.com/plant-problems/disease/verticillium-wilt-treatment.htm
https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm
https://www.gardeningknowhow.com/ornamental/shrubs/spirea/pruning-spirea-shrubs.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm
Was this answer useful?00 - Asked by
Anonymous on
September 8, 2023Q.I Have 60 Spirea That Are Not Blooming. Cm
They are on my property line. The first few years they were beautiful, but the last couple years they have not bloomed at all. What can I do? Thank you.
- Answered by
luis_pr on
September 8, 2023A.Spirea offers spring blooming as well as summer blooming varieties. Spring blooming varieties flower from May to June, while summer blooming varieties develop flower buds in the spring and flower from July to September. Spring flowering blooms on old wood from the growth of the previous year. If you are not getting blooms, consider these possibilities:
• it is not getting enough daily sunlight. This plant requires full sun each day or more than 6 hours of direct sunlight. The shrub will continue to grow in partial shade, but you will get more foliage growth and not as much blooming.
• Improper timing of plant pruning: pruning should be done just after the first set of blooms are spent. For example, since the dormant spring bloom developed last year, pruning before it blooms would accidentally remove the flower buds, especially if it is during spring time. Or, if you prune a summer blooming variety in the spring, you may cutting off the flower buds before they open.
• A harsh winter could damage the previous season’s buds, causing them to not flower.
• Spireas may reduce or eliminate blooms if the soil is over-fertilized so do not use high-nitrogen fertilizers or apply fertilizers earlier than the product requires.
• The soil is extremely acidic or very alkaline. Consider amending the soil to see if the soil pH is preventing the uptake of nutrients.For a spring blooming spirea, you can prune about 1/3 of the plant after blooming. If you have a summer-blooming spirea, give it a light trim after blooming to remove the old blooms and do any hard pruning in late winter.
Was this answer useful?00 - Asked by
tiddick on
October 15, 2023
Dryden, NYQ.I Have Planted Two Spirea Plants One Is Growing Normally The Other Is Growing Horizontal With The Ground. What Is The Best Way To
I would just like to know how to correct this growing pattern?
- Answered by
BushDoctor on
October 17, 2023
Certified ExpertA.Unfortunately, your photos did not come through. I am unable to see, exactly, what is going on. It sounds like there could be uneven light to the area. Many plants will lean towards light if there is not enough.
These articles will offer information on Spirea:
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