I discovered primroses when they were on sale in late spring at my local Lowes. Unfamiliar with them, I planted the yellow flower primroses in one container and purple flower primroses in another container. The containers are identical, are side-by-side, as well as using the same type of potting soil, amount of watering, etc.
The yellow primroses have done beautifully from the first day. The other primroses had pretty purple flowers in the beginning and now the flowers are spotted with white spots. It doesn't look like anything is on the leaf, it looks like spots of white -- as if someone threw tiny drops of bleach on each flower. Additionally, the flowers seem to bloom and die in a very short span, in comparison to the yellow ones.
Can you tell me what is wrong with the purple primroses and how to fix it?
If care is identical, it's nothing you are doing wrong. Since the plants came from a box store, it is possible that the grower used two different "series" of primrose. And, sometimes different colors of the same series don't act exactly the same. Maybe the flowers on the purple plants are older, and fading. Since the foliage seems okay, It's just an act of nature.
Plants are getting too large. Some would do better in a different location. Can I do that now or do I need to wait for spring.
In most areas, it is getting to be a bit late for dividing and transplanting outdoor plants. I would recommend waiting until the spring to do this. This article will help you when the spring comes:
https://www.gardeningknowhow.com/garden-how-to/propagation/propgen/dividing-plants.htm
Just bought some beautiful potted primroses and now am worried as to how much light, humidity (indoors), water, etc. to keep them healthy and blooming.
This article will help: https://www.gardeningknowhow.com/ornamental/flowers/primrose/primrose-houseplant.htm
When I buy primula, do I have to plant them in a bigger pot or I can keep them in their original pot? Thank you.
This is really dependent on the container its currently in. Look at the type of pot you have and its current drainage situation. Sometimes pots have a saucer attached to the bottom which catches water. This can usually be taken off to allow the water to freely drain from the plant and keep you from having to continually tip it out, as standing water can lead to issues with root rot. If there is no saucer-like bottom, check that there are adequate drainage holes, or if there are none, in which case you may need to repot the plant into another container that provides better drainage. Also, if the pot seems too small for the plant, repotting may be necessary. For additional help with repotting, here is more information: https://www.gardeningknowhow.com/houseplants/hpgen/should-you-repot-your-plant-happy-root-bound-house-plants.htm, https://www.gardeningknowhow.com/houseplants/hpgen/learn-more-about-repotting-houseplants.htm
My company frequently sells or gives away plants when they're done using them. I have two primroses and live in PA. When is it safe to plant them outside?
If they are indoor grown primroses, I would wait until the chance of frost has passed. While they may be hardy, they will not have developed the hardening chemicals that outdoor plants produce to protect them from the cold and would be susceptible to frost.
When can I safely plant primrose outdoors?
If they are indoor grown primroses, I would wait until the chance of frost has passed. While they may be hardy, they will not have developed the hardening chemicals that outdoor plants produce to protect them from the cold and would be susceptible to frost. Here is more information on growing primrose plants: https://www.gardeningknowhow.com/ornamental/flowers/primrose/growing-primrose-primrose-plants-in-your-garden.htm
AS PRIMULAS DIE OFF DO I LEAVE IN SAME POTS THEN RE-POT IN AUTUMN
If your potted primulas are in the house, this article may give you some helpful advice: https://www.gardeningknowhow.com/ornamental/flowers/primrose/primrose-houseplant.htm
If you want to regrow outdoor containers, the most effective approach would probably be to replant new plants, or sow new seeds, in the spring.