The general rule for planting bulbs is to plant them at a depth of about two to three times the height or size of the bulb. For example, a bulb that is 5 cm tall should be planted 10 to 15 cm deep. Larger bulbs like tulips and daffodils are often planted about 15 to 30 cm deep, depending on their size. Smaller bulbs like crocuses or snowdrops are planted more shallowly, around 10 cm or a bit less. It is important to plant bulbs pointed end up and to cover them with soil at the recommended depth. Planting bulbs too shallow may expose them to cold or pests, while planting them too deep can delay or prevent flowering. This rule applies whether planting in the ground or in pots, though pots may limit depth somewhat. Overall, measuring the bulb and planting two to three times that depth usually ensures healthy growth and blooming.
Additional advice:
- For some bulbs like imperial fritillaries and snake's head fritillaries, deeper planting may help protect them.
- Mulch should not be counted in the planting depth measurement; bulbs should be planted at the correct depth in the soil itself.
- Dig holes a bit deeper than needed to loosen soil and encourage root growth.
- Group bulbs to create natural effects and extend bloom times by mixing varieties.
In summary, plant bulbs at a depth of two to three times their height in soil, with variations depending on bulb type and size, ensuring the pointed end faces upward for best results.
