For an illustration of how I use the cram them in method of finding space for my bulbs, here is a picture of my daylily garden bed that is planted on the slope next to my driveway from early this spring. I already had daffodils, red impression tulips and showwinner tulips planted in there. Also 100 single lates but those never return for me. This fall added 100 single lates again, more daffs and more red impressions. Then also 200 single early mix, 120 Maria Christina tulips and about 60 Ancilla tulips.
All are in the slope and that makes a lot of tulips on there as it is not such a terrible large area.