Dirt
Ditto from the multiple above posters, I'm actually amazed how easily I detect your photos as they stand out in your frequent banner settings.
I'm placing out my spring bulbs soon, perhaps within the next two weeks after cooler weather sets in and the ground gets some moisture from our first rains. Its raining outside, for us after months of dry dry weather it is such a sense of relief!
So your red tulips image is such an adequate reminder! in my purchased lot there's one very similar in colour ('Île de France'), but single.
Triumph Tulip (Tulipa 'Ile de France')
Are your tulips normal sized or are they dwarf cultivars ( if they exist) better adapted to a rock garden setting? I do have great difficulty of estimating plant size from a photo...
Arturo