There as so many different types of Tulip, different flowering times, different sizes and as many different care as in soil, temp, different size of bulbs.
As a general rule for ALL bulbs, they require planting 3 time the depth of the actual Bulb size, in other words, IF a bulb measures 2 inches from growing tip to the bottom (root end) then the bulb needs planted about 6 inches, for different bulbs depending on soil, you either need to add some humus (compost or manure) this allows air, nutrients and allows the soil to retain a bit more moisture, however, there are other bulbs that require a added drainage so you would put some horticultural sand or very small grit to the planting hole and this prevents the bulb sitting in too wet soil, tulips don't like wet soil but I would imagine in your area you wont have that problem. Here in UK (West coast and very damp most times) so I lift Tulips each year After flowering has passed.
IF you can remember the actual Name of the Tulips, you could then do a search of that type of tulip and the height, care and any other requirements could help you out,
They do look very healthy, the flowers are large and colourful, the foliage looks strong and other than being short in stature, I don't see anything un-to-ward with them, the only other thing I can think of, IF the bulbs were meant for INDOOR planting, being outside could stunt the growth.
Wish I could help you more, Maybe asking on the Plant identification forum could also help you find out more about the bulbs.
Good luck and kindest Regards.
WeeNel.
