I live in Chicago and planted my pansies from seeds in April, in my air conditioned apartment. They get plenty of sun and look healthy. I have them in the south-facing windows. Now that the temperatures have gotten cooler, I was expecting them to start blossoming, but they haven't yet. Some of them are kind of tall and hang off the sides of the pot, which I am not sure is normal. I was wondering why they aren't blooming and when I should expect them to.
It may be too much nitrogen. Try giving them a little bone meal. This will boost the phosphorus, which will help with blooming.
This article will cover some other issues that may cause plants not to bloom:
Why do bedding pansies flower up in Dec. and others go on until spring?
It just depends on the cold hardiness of the variety of pansy you plant, really. Some varieties do better with the cold than others.
Another possibility is that you have microclimates in your yard that protect some pansies more than others from the cold.
I'm wondering if I should replant them (and of course, cover them with the garden mesh/netting) or if the stubs the deer left behind will grow back and bloom before winter kicks in.
It really depends on how far down they ate them and what your weather is like (colder weather will mean slower growth).
I personally would go ahead and replace them, just to make sure I get blooms in time.
I grow pansies. They get well established, look great and then just wilt and die. On examination the roots have rotted, but I cannot find any insects or bugs. My soil is good well drained, so I wonder if there is a soil-borne disease that I am not aware of. Very disappointing when it happens.
Please can you advise where I can find a lab to send a soil sample and pansy plant?
This link should help with locating an office near you: https://www.gardeningknowhow.com/extension-search
Get in touch with your local agricultural extension office. They should be able to either send it to your state's DoA lab, or advise you about other labs. There may be a fee for this service.
Pansies are cool weather plants. They do not like heat. Pansies will not tolerate constantly wet soil. Yes, there are many soil borne pathogens that could be identified by lab tests.
I have a small garden shop in south Mississippi. I have hundreds of pansies in 4 inch pots. We are having temperstures in the late 20s tonight and tomorrow. If I water them down real good, will they be ok? Same with dianthus and snapdragons? All theses plants are facing east but they also are subjected to north winds.
The pansies might be ok, and the snap dragons, though less so. Both are likely to suffer some damage. The dianthus will likely not survive though without some really good protection.
Water them well. If you have twinkle lights, weave them among the pots. Or you can fill jugs with hot water and set them among the plants.
Then cover them all with cloth sheets.
This article may help:
I live in Raleigh, NC. It is warming up now. Is this a good time to add fertilizer to my pansies? Thanks!
Yes, it is ok to fertilize these plants during warm spells this time of year. In fact, most pansies can be fertilized regularly throughout the season with something specifically formulated for pansies, but basically any commercial fertilizer will work just as well.
Have large area to plant out with bedding plants - Pansies, primroses, etc. - and would like to know correct space between plants.
The distance depends on the kind of plant, and the look you want. If you're starting from seed, the height and width of mature plants should be printed on the seed package; size information should also be on the tags of plants sold rooted. If you want open area around the plants, plant them wider than the projected width, e.g. 8" width could be planted 10", 12" even 15" apart. If you want a solid swath of plant, set them a little closer than the projected width, e.g. 8"width could be planted 8" - 6" apart. This article has some more information: https://www.gardeningknowhow.com/ornamental/flowers/fgen/mass-planting-ideas.htm