Same Question. White Spots On Dark Red And Indoor Primula( Not Primrose) Flowers Not Leaves.

Question

The flowers do look like someone splashed bleach on them. Could it be a fertilizer problem? This question was asked by another person but the answer was not helpful.

Answer 1

It could be! Unfortunately, without images it would be hard to say. Other reasons could include powdery mildew, Cercosporella primulae, the start of Botrytis (though less likely in my opinion) or a number of nutrient deficiencies. With some images, I can get a better idea of what is going on.

In the meantime, this collection of articles can help:

https://www.gardeningknowhow.com/ornamental/flowers/primrose