All the blooms are just beautiful. I have daffys, crocus, hyacinth, squill and glories of the snow. I am really enjoying the color but I can also see spots that are bare. I would like to plant these spots with the appropriate bulbs but when the time comes to plant new bulbs the existing ones are dormant and I cannot tell exactly where they are. How do you keep track of where your bulbs are planted? What methods do you recommend to mark them?