How do I prune and when? My clematis plants are Josephine diamantina and crystal fountain.
Make sure you wait till the second year, and always only after it blooms. This article will give you some additional tips on pruning your clematis: https://www.gardeningknowhow.com/ornamental/vines/clematis/pruning-clematis-vines.htm
I planted a clematis in my garden late in summer last year in a very sunny location. It grew well, is supported by a trellis and did some blooming last year. As required, the roots are kept cool by a generous layer of mulch. This spring it started growing very profusely, sprouting several shoots and very quickly made it all the way up to the top of the trellis, creating a thick layer of foliage. However, up until now it never had a single blossom, and I can't really see any buds anywhere. What is wrong here? Your advice would be much appreciated.
Most likely your Clematis is just busy establishing it's root system and will reward you with years of flowers in the future.
Over fertilizing is a common mistake and will inhibit flowering.
This article will help you.
https://www.gardeningknowhow.com/ornamental/vines/clematis/getting-clematis-to-flower.htm
Should I cut off the whirls left on the clematis after flowers have dropped? I have a clematis called Rebecca and it has produced lovely flowers. It has left whirls after flowers dropped. Do I cut these off or leave them?
It is a good idea to remove the seedheads left after the flowers drop, because this will encourage the plant to produce more flowers. However, many people consider clematis seedheads beautiful in themselves so leaving them on the plant is also an option.
I live in the south suburbs of Cleveland, Ohio. I have 20 clematis plants of different varities. I'm trying to purchase the dwarf "Sieboldii" and "Polish" varieties. Can you help?
I would do a Google search for the specific Clematis varieties you are looking for.
You should be able to find a grower that can ship to you.
Also Ebay is a good source for plants and seeds. Just make sure you check their feedback to make sure they are a reputable seller.
I have a Clematis that was planted in the garden before I bought this house. I discovered it when it bloomed in the spring. It was behind a very large pine tree and all I saw were the blooms as they curled around the tree. It was planted in a corner of the house (a wall on the west side and a wall on the north side). I removed the tree and made a garden in the corner. It has been beautiful for many years (I have been here for 12 years), and this past spring it was beautiful. However, since spring it has looked poorly. We have had a dry summer. I try to water my garden but didn't realize that the clematis was not getting a deep enough watering. I also had several hosta plants near the foot of the clematis, but they also looked bad, although they are coming back. What type of fertilizer can I use to help the plant return to its former beauty? Is Miracle Gro okay?
In situations with a stressed plant, especially a drought-affected plant, it is best to use a slow-release form of nutrients to avoid further stressing the plant. Fall is a good time to add compost or a slow-release commercial fertilizer according to the package directions, along with plenty of water. Next spring it should be back to normal.
4 yr.old autumn clematis grows really well but no buds or blooms. What gives? The autumn clematis is planted in full sun, in good soil, by the porch for it to climb on. I have tied it up and it gets good moisture. It's growing beautifully but never flowers. I understand it blooms on new growth, so it gets pruned back in late fall. Help. Thank you.
You likely have an imbalance in your Nitrogen/Phosphorous levels. To much Nitrogen will cause lush greens and no flowers.
You can add a Phosphorous fertilizer like Bone Meal to help promote flowering.
Here is a link with more information.
https://www.gardeningknowhow.com/ornamental/vines/clematis/summer-blooming-clematis.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm
My Clematis has gone totally dark brown. I do not believe this is due to a lack of watering, as I watered frequently; therefore, my question is did I over-water it? What causes clematis to go like this?
It is possible to overwater clematis, especially if you have poorly draining soil such as heavy clay. Overwatering would more typically cause leaves to turn yellow before they turn brown. Toxins in the soil such as excessive salt or fertilizer can also be a problem, particularly if the plant is close to a road.
There is also the possibility of a disease:
https://extension.psu.edu/pests/plant-diseases/all-fact-sheets/clematis-diseases