Check local retailers and garden centers for your desired varieties or:
John Scheepers
The company also has a catalog for discounted large orders,
Brent and Becky’s Bulbs
Longfield Gardens
Tulip bulbs can be planted until the ground freezes, but don’t push your luck: Put them in as soon as you have them. If you can’t plant them for a while, keep them in the fridge, not the freezer, but not near fruits and veggies.
Left in damp, warm environments, tulip bulbs will rot.
Tulips should be planted deeply, at least seven inches, to thwart squirrels from digging them up.
If you are planting many bulbs in open ground, dig a trench with a shovel. If you are setting them among existing plants, you have options. In rich, loamy soil, a sturdy trowel will be sufficient. In poorer, denser soil, one of the best tools is a long-handled bulb planter — a steel tube on a stick — that puts the strong leg muscles to work. Even in established beds, designer Angela Jupe likes to use a narrow spade to dig segments of trenches between the perennials. If you want scores of tulips, this is quicker than digging individual holes, she said.
Tulips should be planted three to five inches apart, with the base down and the nose up. Tulips planted in organically rich soil don’t need feeding. In poorer soil, mix in a little bulb food with the soil above the tulips. Avoid letting fertilizer touch the bulbs, and don’t use high-nitrogen feeds.