Planting bulbs in a lawn

dead head them when they finishe flowering and then leave the leaves for about 4-6 weeks, so the bulb forms new flowers for next year, then cut as normal. It might be better to plant in definite areas rather than the whole grass so you can keep most of the grass nice.

yes it is possible the leaves will die down on their own .wait till they go yellow .then cut as normal with your mower.

I was thinking about doing that with my grass, with crocuses ... like you see in public gardens.

Crocus is probably the best bulb for growing in lawns as they flower and die down quite early in the season. Even so, the leaves may still be present at the time for your first mowing so try to leave them until they have gone over. Why not try a bulb planting in a small, contained area of your lawn this time ( get planting now) to see just what happens then expand it in future years. A mature crocus lawn is a thing to be marvelled at.

Thanks for all your useful advice everyone!