Not sure what else to ask. Do the annual verbena e.g Proven Winners produce seed so I can collect some?
Yes, you can collect seeds from the Annual Verbena. This article will help you to do so: https://www.gardeningknowhow.com/ornamental/flowers/verbena/verbena-seed-harvest.htm
What is this and will my plant start flowering again. I have three big established bushes
Unfortunately, your photo did not come through. It sounds like dead flowering buds, but I can't confirm without seeing it.
In the meantime, this article will help you to care for the plant:
https://www.gardeningknowhow.com/ornamental/flowers/verbena/growing-verbena-plants.htm
ained alit last week and I noticed in the beginning of the week that they weren’t well. Could they b overwatered? The stems r no t dry and don’t snap off, they feel rubbery . I can’t stop the dying stems pls help ! I’ve been growing verbena for years an d hav nvr had this problem !
If those containers do not let all extra water drain out freely, or the soil is not well draining, then yes. This looks to be an overwatering problem. Most commonly it will be Phytopthora or Verticillium. Sometimes they are treatable, but the best thing to do will be to discard soil, and sterilize the container. Start with fresh soil and fresh plants next season.
Here is an article that will help you to grow Verbena:
https://www.gardeningknowhow.com/ornamental/flowers/verbena/growing-verbena-plants.htm
Hi: I live in Houston and would like to grow Verbena rigida by direct sowing seed. What germination rate should I expect? Will they bloom in their first summer? Can I improve germination by placing seed packets in the fridge for a couple of weeks?
The rate at which these seeds will germinate varies. To quote our experts, "Verbena seed germination can take as little as 20 days or up to a month or more. The seeds are variable, so be patient."
Verbena seeds can benefit from cold stratification; here's an article that explains how to accomplish that: https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/seed-stratification.htm
Here's another about growing verbena from seed: https://www.gardeningknowhow.com/ornamental/flowers/verbena/verbena-seed-germination.htm
Hi: I live in Houston (zone 9a) and have several hundred seeds of V. rigida. My partner is unwilling to have them taking up space in the fridge on moist towels. Would it be ok to chill them in their packets then direct sow? Since Houston winters are mild, should I sow them in the fall or in the spring? Thanks for your time and consideration!
Since it's such a short time till fall planting, you can just chill them in their packets. I would go ahead and plant them this fall since you live in a mild area.
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/wet-vs-dry-stratification.htm
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/does-freezing-kill-seeds.htm
Hi: I want to grow Verbena rigida in Houston by direct sowing. What germination rate should I expect, and for how long should they bloom? Thanks for your time and consideration!
It is a long blooming perennial, and most will bloom from spring till frost with deadheading. Germination can take up to a month, however.
https://www.gardeningknowhow.com/ornamental/flowers/verbena/annual-perennial-verbena-varieties.htm
I only seem to have luck getting the purple verbena to.grow in upper S.C. I have tried the pink why is that?
The pink may not be able to tolerate humidity as well as the purple.
https://www.gardeningknowhow.com/ornamental/flowers/verbena/growing-verbena-plants.htm