I ordered darwin tulips, daffodils, and crocus bulbs and they will soon be arriving. I am wondering what the best way is to plant them to increase drainage and keep them from rotting. Once they are planted, I plan to leave them be and not dig them up each year. I have mostly fertile clay soil that does tend to get soggy during the winter & spring. I have heard recommendations to put compost underneath each bulb and have also heard the advice to put pea gravel under each bulb. What do you recommend? Should I mix the compost with the pea gravel or just do one or the other? Last year, I had some tulips just planted in the dirt and they seemed to do fine.