Half Eaten Flowers

Question

I have many primulas in the garden and have noted that on one of the clumps, they are red with yellow centres, there is only the centres left, something has eaten the tops of each little flower. All the others are fine, just this one clump

Answer 1

It could be slugs or snails. They eat at night and retreat before you get up in the morning. However, there are several other problems that plague primroses. Read about them here:
https://www.gardeningknowhow.com/ornamental/flowers/primrose/primrose-diseases-and-pests.htm