How can you tell if a bloom is just closed for the night or is done blooming and ready to be deadheaded on Gazanias?
Most flowers that close, close UP at the end of the day, the same as before they are opened. When the bloom is done, the petals wilt, sometimes turn brownish, and droop DOWN. It's been awhile since I've had gazanias, but I think they probably do that too.
I wish to save seeds to plant more Gazanias next spring. How do these plants re-seed?
In the far south they reseed themselves. They probably won't survive the winter in zone 8. You'll get better results for next year by starting cuttings. This article has more information: https://www.gardeningknowhow.com/ornamental/flowers/gazania/gazania-treasure-flowers.htm
I've brought a couple of the potted Gazania into my sun porch and want to know if anyone has over wintered these with success.
Yes, you can treat them as houseplants, or make cuttings and grow them over the winter. This article will give you plenty of info on gazania: http://www.gardening.cornell.edu/homegardening/scene5877.html
I have a beautiful gazania that I stumbled upon by accident in the discard/discount section of Lowe's. There was only one bloom left on a half dead plant, but it was beautiful and I hoped I could salvage the plant. I'm fairly new to gardening and never heard of them before. Well... the plant "took" and has grown beautifully in my yard and has had gorgeous flowers for some time now. I live on Long Island and expect this winter to be as brutal as last year's. I would like to save this plant. Should I dig it up and put it in a pot to take inside for the winter? I read that I could take cuttings, but I never seem to do it right. Help!
Generally, gazania is grown as an annual in the north. However, you can try to pot up the roots and overwinter in a cool, dark spot. Taking cuttings should work, too, but getting the hang of starting cuttings is not easy. Keep trying. Try using perlite as a potting medium, and covering the starts with plastic or the cut-off tops of clear soda bottles. Maybe these articles will be useful: https://www.gardeningknowhow.com/ornamental/flowers/gazania/gazania-treasure-flowers.htm
My gazania seedlings are growing nicely but are getting quite tall. Can they be pinched back to make sturdier plants and, if so, how do you do it? It isn't as clear cut where the pinching back should be like it is with other flower or veggie seedlings.
If your seedlings are quite young and getting tall, they are most likely not getting enough light. When starting seeds indoors
you most likely will need to use additional light source from grow lights. This will help your plants develop and not get
leggy. You should not pinch back your very young seedlings.
If your plants are older and larger, they could be cut back. I will trim back my gazania after they have their first bloom.
Here is a link about Gazania
I planted Gazanias last year and they had big colourful flowers on long stems. This year they are quite small on short stems. How can I make them like the first lot?
The environment essentially determines how well a plant's needs are met and how close it will come to reaching its true potential. Gazania height can be anywhere from 6-18" inches. The growing conditions last year may have been more ideal for the gazania. The best thing you can do right now is to provide your gazanias the proper care they need, which is outlined in the article below. If you want, you could give your gazania a well-balanced, organic fertilizer.
As I have left it too late for spraying in the spring, what is the name of the spray which I can use through the summer? My Gazanias have been attacked badly and don't want to lose them.
I would recommend using neem oil as it is safe to use and generally effective against man types of insect pests.