If you could post a picture of one of the crocus flowers (inside as well as outside) it may be possible to say what sort of Crocus it is. Many of the species types are smaller. The big ones are forms of Crocus vernus.

Its unlikely they will be bigger next year. But when they have finished flowering give the foliage a liquid feed and leave the leaves to die down naturally. As Owdboggy says it could be due to the species that was in the mix.

Because all bloomed the same size (smallish) that's what they are and what they will be. They do have their advantages. The bigger ones are flippy floppy in the rain & wind.

Many thanks to - Owdboggy Seaburngirl Bathgate

for your answers, much appreciated. I'll buy Crocus vernus in future, although the ones we have don't look too bad now they are flowering!

The vernus are often refered to as 'large flowered Dutch crocus' in garden centres. My own prefence is for the smaller species varieties, particulary as they flower earlier. They are great to have some in pots in the empty greenhouse to give early colour that you can admire out of the weather. They also look good planted in the lawn as they are over at about the time you start grass cutting; these are the ones that you might see in roadside verges.

Many thanks for your reply

Sorry if this is a bit late to join in but I really regret buying some of the large varieties. Unless they’re in really sheltered spots they’ve flopped like Bathgate says in the wind and rain and I’ve had to cut them off whereas the little ones have survived well

Thanks SunBeam . . . . good point. Since I posted our Crocus are looking good, perhaps not too tall but looking good!