What would this be and how to treat? Plant seems to be doing okay but this white substance isn't right.
Powdery Mildew is a fungus and it can be treated.
This is a common garden issue and there are several options for treatment.
Here are some links for you.
https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/honeysuckle-vine-care.htm
Is there a wild one which blooms in spring in Scotland?
I do not have information on wild honeysuckle but these cultivators are spring or late spring bloomers.
Trumpet, Dropmore Scarlet, Graham Thomas, Pink Lemonaide and Japanese.
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/
I bought my honeysuckle plant this year and planted against a fence. It has grown really well and has now produced beautiful red berries. Are these poisonous? Will this plant come up year after year?
Honeysuckle Vines and their nectar are not poisonous, but the berries of some species can be toxic, but only if ingested in large quantities.
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/types-of-honeysuckle-plants.htm
When is a good time to move honeysuckle plants to a new location?
In most cases, they will have a better chance of surviving when planted in fall, as they will usually go dormant in winter. However, in your region this vine can be planted in spring or fall either one.
Is honeysuckle poisonous to chickens? Is there a better choice for growing around chickens?
Honeysuckle is listed as toxic to chickens.
That being said, my chickens have scratched around the Honeysuckle for years with no problems.
Here is a link to find the list of toxic plants.
I want to grow honeysuckle but have limited space. Can I prune to keep it to a circular obelisk 8 feet tall by about 2 feet diameter?
Thank you, the link is very useful.
Yes, you will need to add nutrients, keep an eye on watering, prune regularly and change soil every 4 years.
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/honeysuckle-vine-care.htm
I have a honeysuckle vine that has grown into a bush and the vines cascade across a wood fence. There are some sprouts that have come up on their own around the base and I'm wondering if those sprouts can be transplanted and, if so, will they grow into a bush?
Here are some articles that will help you.
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/prune-honeysuckle-plants.htm
https://www.gardeningknowhow.com/ornamental/vines/honeysuckle/japanese-honeysuckle-weed.htm