Buy our crocus bulbs through our Amazon store:
Hardiness Zones: USDA Hardiness Zones 3 - 9.
Full sun to partial shade. Crocuses do best in full sun, but since they bloom so early in the year, there are few leaves on the trees to shade them anyway. If the temperature heats up crocus will fade quickly.
Soil: Crocus plants prefer a neutral soil. More important than soil pH is good drainage. As with most bulb-like plants, crocus does not like to sit in wet soil, especially during the summer when they are dormant.
Planting Crocus Bulbs: Spring blooming crocus are planted in the early fall. Plant them about 4 inches deep and 2-4 inches apart, pointed end up. It can sometimes be hard to tell which the pointed end of a corm is, but don't worry too much. The plant will grow toward the light.
You can also plant the bulbs in pots on patios, decks or window boxes. Just make sure they have access to water.
Alternately, you could plant them in pots and enjoy seeing them come up indoors. The flowers won’t last as long as they will outside but a group of potted crocuses indoors are a wonderful way to welcome (or just hope for) spring!
Severe Weather Warning: If you live in the southern part of the United States, please keep your bulbs in the refrigerator (low humidity drawer) until the beginning of December, and then plant them outside. It’s possible that some mold will grow on the bulbs, which does not harm the bulb in any sort of way.
If you have planted your bulbs in planter boxes or pots, and the weather forecast predicts weather well below freezing, then protect your bulbs by either covering them in bark dust, or moving the pots close to side of the house to protect them from the frost.
Maintenance: Crocuses require very little maintenance. They like to be watered regularly in the spring and fall. If there is no snow cover, the corms will also need water throughout the winter. They go dormant during the summer and prefer a drier soil.
Fertilizer: Crocuses do not require a lot of fertilizer. They store their own energy in their corms, which is why it is essential that you do not cut back the leaves until they yellow on their own. However a light top dressing in the fall, with bulb food or bone meal, is a good idea in poor soils.
Dividing Crocuses: You don't need to divide your crocus plants. In fact, in many areas they will be somewhat short-lived and you may need to replant every few years. However, if your crocus do very well and start to multiply, they will eventually begin to bloom less. When that happens, you can lift and divide the corms when the foliage starts to die back and replant where you wish.