Please could someone explain what is wrong with this Spirea and how to remedy it
This looks like Fire Blight, which is common in Spirea.
When it rains in spring, spores get bounced from stems and branches onto flowers and new growth, infecting the tissue and starting the process over again. Fire blight is cyclical, with alternate plant hosts, so it may not even be a problem most years.
In your situation, I’d recommend pruning out the affected areas, making sure to clean up any leaf or branch litter around the plant. Late winter next year, check the bark for any oozing cankers, and prune out those areas, making sure to toss all of that infected plant material in the garbage.
With regular checking, you should be able to get the issue under control and make it manageable, without having to do anything more than cultural maintenance.
I don't know what this plant is . It bloomed but the blossoms turned brown and dry in a day or 2. What is wrong? The green leaves look healthy.
I don't see a place to upload a photo
I have four of the same bush under my window one of the four is not turning brown the other four look like dead bushes, what should I do I planted them in the spring. The three bushes is the front are as healthy as when we planted them
Newly planted shrubs need regular watering in the first year to help them become established.
Use the article blow to verify the planting and growing conditions.
https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm
I planted two nice bright yellowy Goldmound Spireas among other varieties of Spirea to give a shot of the cheery color. Within a few weeks, they both were darker green than all the other varieties. They get 8-10 hours of sunshine. They are otherwise nice and healthy. I'm an artist and have designed my flower garden as carefully as I would a painting so I'm a little disappointed. No smart phone, so no pictures to send. Evelyn Miller
Color change is normal in this variety.
Vibrant golden spring foliage, accented by clusters of pink flowers, cools to a yellowish green in summer then a rich, yellowish orange in fall.
Have 4 small spirea bushes planted in front of my house. They draw a large amount of flies. Can you tell me if this is normal or why this might happen?
Fortunately this is normal. The flies you are seeing are probably syrphid flies, also called flower flies. These are important pollinators of many plants, including spirea, and so they are actually beneficial to the plants.
When is the best time to prune summer blooming spireas, and how much can be trimmed off? Thank you.
You should prune in winter or early spring. Consult this article here: https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm
My spirea blooms in the spring and after trimming blooms again in the summer. Can I trim it back again in September?
Yes, it is advised to trim again in winter. Here is an article that will help: https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm