- Before the ground freezes in the fall, early bulbs can be planted most anywhere, except in the dense shade on the north side of buildings.
- Ideally, plant crocus corms 6 to 8 weeks before a hard frost is expected and when soils are below 60 degrees F. This is usually during September and October in the North, and October and November in the South.
- Make sure the soil drains well, because bulbs will rot in soggy ground.
- Work in organic matter such as compost, peat or a substitute, such as shredded leaves to a depth of at least 10 inches.
- Plant crocus bulbs 3 to 4 inches deep (with the pointy end up). After planting, water well.
- Plant bulbs in groups or clusters rather than spacing them in a single line along a walkway or border. Single flowers get lost in the landscape.Plant a few inches apart, and plant in groups of 10 or more.
- Consider planting crocuses in lawns and meadows where they can form carpets, or mass them in the front of flower beds along the edge.
- Plant taller bulbs and spring-flowering shrubs behind the early bulbs for color contrast.
- Apply a balanced fertilizer in early autumn if your spring is short and the days heat up fast; or, apply fertilizer after bulbs flower if your spring is long and temperate; bulbs will have a chance to use the extra nutrients to produce bigger carbohydrate stores.
- Through the autumn, keep crocus beds watered if weather gets dry but do not waterlog. Cover the beds with mulch before the winter.
- In late February, remove mulches from snowdrops and crocuses so the shoots can come through.
- In February and March, keep plastic milk jugs or other coverings on hand to protect the flowers of crocuses and other early bloomers against the return of severe weather.
- If you have crocuses growing in your lawn in mid-Spring, don't mow until their leaves have died down.
- Mice, voles, and squirrels may feed on the corms. If they are a problem, consider planting crocus bulbs in buried wire cages.
- Birds sometimes pick off the flowers.
- Corms in storage are prone to rots and molds.