Fertilizing
Bone meal or slow-release bulb fertilizer should be placed in the hole before planting. Lightly mix the fertilizer with the soil. Be sure to follow the package directions, which vary depending on the planting area.
For established bulbs that are left in the ground each season, you should top dress the soil with bone meal and mix thoroughly using a cultivator every couple of years.
Planting
As a general guide, plant larger bulbs like tulips, daffodils and hyacinths 6” deep and 6” apart. Smaller bulbs like crocuses (which are actually corms – short, solid underground stems covered in papery leaves) and grape hyacinths should be planted 3” deep and 3” apart. Planting at the maximum recommended depth helps to protect bulbs from moisture loss during intense heat and also helps deter predators (squirrels love tulips).
Planting the bulbs in the right direction is key. For pointed bulbs such as tulips, daffodils and hyacinths, ensure the pointed part faces up toward the sky, and the flat part faces down into the ground. If you can’t tell which end is which, plant it sideways — this makes it easier for the plant shoot and roots to grow in the correct direction.
Plant larger bulbs, such as the hyacinth (top) and tulips bulbs (right), about 6” deep and 6” apart. Smaller bulbs, such as muscari (left), should be planted 3” deep and about 3” apart.