it? Will my Trumpet Vine come back?
Zone 4 is right on the edge of where they can survive. I don't know about your area but these last two winters have been particularly cold, and the summers cooler than average.
If it got cooler, or stayed cooler for longer in your area, then it is likely that it has died. You may need to replant.
If there is no growth by the end of May, then go ahead and try again with planting, but be sure to mulch a little extra as we move into a solar cooling period. It is likely to get too cold over winter again during these solar minimum cooling periods.
I have black spot and black powdery mildew on my trumpet vine. What can I spray on it to kill these issues i'm having with this?
I use a product called Green Cure. It is an earth friendly fungicide. You can get it on-line at Amazon.com. The Cure Rate is two of the scoops that come in the product jar per gallon of water. It works very well. Spray every 7 to 10 days for at least 4 sprayings. The black spot typically does not ever go away on the older foliage but should not show up on the new foliage.
It us on a tree. Should I cut the tree some?
A hard prune may be what is needed to rejuvenate your vine.
These articles will help you.
https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/pruning-trumpet-vines.htm
https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/feeding-trumpet-vines.htm
https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/trumpet-vine-no-blooms.htm
...had no water for a week in the hot, late June South Carolina sun. It didn't rain all week. The base of the vine still has green leaves, but the vines have a greenish-brown hue and dead leaves. Should I cut down the vines? Should I wait and see if the vines come back after a good watering? I just planted this vine in March, so it's a new plant.
I would suggest water, wait and see.
But you can assess dead vs living stems by bending them; if they are completely dried up and snap off readily they can be considered dead. And/or if you slice some bark off and look for a green growing layer under the bark, it indicates that the stem may still be viable and will leaf out again.
Have had Trumpet Vine growing in yard for a number of years. Now in July, noticed first leaf that is completely removed from its stem. Over time additional leaves disappear until plant is seriously compromised. Plant comes out each Spring but then starts losing individual leaves while other leaves look very healthy. What is causing the leaf loss? How can it be treated?
Since they are susceptible to a range of disease and insect infestation, it could be a number of things. This article will help you to narrow down the possibilities and find treatments options: https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/trumpet-vine-losing-leaves.htm
I just purchased a trumpet creeper from the nursery and don't know how old it is
It can take up to 10 years to see blooms.
Optimize care and have patience.
https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/trumpet-vine-no-blooms.htm
https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/growing-trumpet-vines.htm
When the flowers on my trumpet plant are finished do l remove them or let them go the full course and let them fall off naturally?
It depends on if you would like seeds or not. If you don't, then just deadhead them. If you do, then let them mature.
This article will give you more information on their care: https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/growing-trumpet-vines.htm