I planted Vinca major this spring. Most of it is doing well but I think something is eating the roots. What can I do?
This could be rodents, voles or even squirrel and chipmunks.
Here are some articles that may help you.
https://www.gardeningknowhow.com/ornamental/bulbs/bgen/protect-flower-bulbs.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/vole-control.htm
I would like to plant periwinkle ground cover along the ditch between the road and pasture. Hoping for both beauty and wild grass control. I have it in some garden beds around and like it. I was hoping in early spring I could round-up everything that is there now and then come back and broadcast the seeds by hand over the area. Is this a viable game plan? Thanks for your help!
Periwinkle is a great choice to plant along the road because it doesn't get very tall, requires little maintenance once it's established and helps control erosion.
Your plans sounds fine. Make sure you keep the weeds out while your Periwinkle is still young. Once it starts to take off, it will likely choke out everything else.
This article may give you some helpful tips:
https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm
I have vincas planted under a juniper tree. Their leaves are yellowed. I can't get them to grow or green up. Any advice?
Too much sun and too much water can cause the leaves to yellow and if the conditions persist, the plants can suffer root rot.
Vinca prefer to grow in dry conditions.
The links below will refresh you on the care requirements.
I also included a link that lists the most common diseases in Vinca.
https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm
http://www.clemson.edu/extension/hgic/pests/plant_pests/flowers/hgic2108.html
The old kind of white vinca (not the hybrids), which has now been almost classified as invasive) is very hard to find. Luckily, a friend gave me 4 plants and they are in full bloom. I need to know exactly how to extract seeds from these vincas so that I can have more white vinca plants in my flowerbed. Bridget King Cape Town, South africa
Leave the blooms on the plants until the end of their bloom cycle.
Remove the pods from the plants and pinch the pods until the seeds fall into a paper bag.
Place the bag with seeds into a warm dry location for 3 weeks.
Shake the bag daily to help them evenly dry.
Place the dry seeds onto a tray and rub the seeds to remove the outer coating from the seeds.
Store them in an envelope and place in dry, cool area. Do not seal them in a container, as they may mold.
Seeds can be planted the following spring.
I have some vinca minor at my new house but It looks like there are two varieties. One seems to be more of a climber, darker green, with a scalloped leaf. Is it even vinca at all?
There are many varieties of Vinca, and I do believe both leave sets are from Vinca Vine.
https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm
Dear Sir/ Madam, I am a research student from India, working on Catharanthus roseus var. Sunstorm apricot (Syngenta seeds). I am facing some problems with the plant. The pods don't seem to mature to bear seeds. They remain very small without growing. I will be in trouble if my experimental plants don't bear seeds. I faced the same problem with the variety Pacifica cherry red (Pan American seeds), also I am growing them in coir pith based medium. They are growing and flowering well. But, the pods are not maturing. Is this a common phenomenon or should I change something? like, growth medium or fertilizer? I would be grateful if you could help me out with this problem. Looking forward to your reply, Thank you, Regards, Nishanth
love my vinca, but has become very woody with white stuff on wood and leaves. Can I cut all to the ground level and will it come back nicely in the spring? SW Missouri.
You can do a hard prune on your plants. You can cut them to 4 to 6 inches above soil. Some gardeners actually mow the plant to make this hard prune.
Here are some links to help you.
It sounds like your plant may have Powdery Mildew.
https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm
https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm