Planting flower bulbs, corms and tubers is an easy way to ensure colourful displays in your garden, particularly in spring before the rest of the garden has woken from its winter dormancy. Bulbs can be planted in containers or borders, and look particularly effective when naturalised in grass.
So if you are wondering how deep to plant daffodil bulbs, how to plant up begonia tubers or when to plant tulips, take a look at our planting depth charts below and discover how easy growing bulbs can be!
Different species require different growing conditions, and you can check their preferred position in our bulb planting depth chart below. As a general rule, plant your bulbs in well drained soil. Those sitting in waterlogged soil will rot.
Always plant bulbs with the pointed growing tip facing upwards. If it isn't clear which is the top, then try planting bulbs on their side. Some tuberous plants such as begonias will be flatter than bulbs and don't have an obvious growing point. Position them just below the compost surface with the indented side facing upwards.
Planting bulbs in containers allows you to move your display into prime position while they’re in full bloom. After flowering, the containers can be moved out of view while the bulbs die back and become dormant. Use a good quality general purpose compost and mix in a handful of fine grit to improve drainage. Alternatively, you can choose specially prepared bulb compost.
Water bulbs in containers regularly as they begin to grow, and continue throughout their flowering period. Once the foliage begins to die back you can gradually reduce watering as they enter their dormant period.
If squirrels and mice become a problem, protect your containers of bulbs by covering the top of the pot with a piece of chicken wire. Once the shoots appear you can remove it to give the foliage and flowers space to grow.
Naturalising bulbs in your lawn can create an impressive display. They’re best grown informally in grass that can be left unmown until the bulb foliage dies back.
For a really natural look, gently scatter them across the planting area and bury each one where it lands. Use a sturdy trowel or bulb planter to dig a hole to the recommended planting depth and drop the bulb in, making sure that it’s facing the right way up. Cover the bulb with soil and gently firm the earth around the bulbs to fill any pockets of air. Avoid treading the ground afterwards as this may damage the bulb growing tips as the soil settles.
If you’re planting large numbers of bulbs then it may be simpler to lift an entire piece of turf with a spade and arrange the bulbs beneath before replacing it.
Bulb planting depths vary depending on their size and species; but as a rule of thumb, most bulbs can be planted at a depth of approximately 3 times their own height. Some tubers, such as begonias, are best started off indoors or in a frost-free greenhouse before transplanting outdoors. Full growing instructions can be found on individual product pages.
|Bulb/Tuber||When to plant bulbs||Bulb Planting depths||Planting distance between bulbs||Position|
|Allium bulbs||Autumn||10cm (4")||10cm (4")||Full sun|
|Begonia tubers||Spring||1cm (1/2")||30cm (12")||Full sun, semi shade, dappled shade|
|Crocus bulbs||Autumn||10cm (4")||7cm (3")||Full sun, semi shade|
|Daffodil bulbs||Autumn||10cm (4")||10cm (4")||Full sun, semi shade|
|Dahlia tubers||Spring||15cm (6")||45cm (18")||Full sun|
|Bluebell bulbs||Spring/Autumn||10cm (4")||10cm (4")||Dappled shade|
|Gladiolus corms||Spring||10cm (4")||15cm (6")||Full sun|
|Hyacinth bulbs||Autumn||10cm (4")||8cm (3")||Full sun, semi shade|
|Iris reticulata bulbs||Autumn||10cm (4")||8cm (3")||Full sun|
|Lily bulbs||Autumn||20cm (8")||15cm (6")||Full sun, semi shade|
|Narcissus bulbs||Autumn||10cm (4")||10cm (4")||Full sun, semi shade|
|Ponerorchis tubers||Spring||2.5cm (1")||7cm (3")||Dappled shade|
|Ranunculus corms||Autumn||8cm (3")||25cm (10")||Full sun|
|Snowdrop bulbs||Spring/Autumn||10cm (4")||10cm (4")||Dappled shade|
|Tree lily bulbs||Autumn||20cm (8")||15cm (6")||Full sun, semi shade|
|Tulip bulbs||Autumn||15cm (6")||13cm (5")||Full sun|
|White Egret Orchid tubers||Spring||2.5cm (1")||7cm (3")||Dappled shade|
|Winter Aconite bulbs||Autumn||5cm (2")||5cm (2")||Full sun, semi shade, dappled shade|
How do you plant bulbs?
Plant bulbs with the pointed growing tip facing up. If it isn't clear, plant bulbs on their sides.
How do you plant bulbs in containers?
Plant bulbs in containers using good quality general purpose compost and mix in a handful of fine grit to improve drainage. You can also use specially prepared bulb compost. Bulbs are perfect for patio containers, just remember to water regularly through the growing season.
How do you plant bulbs in grass?
To plant bulbs in grass, achieve a natural look by gently scattering the bulbs and planting them where they land. Drop the bulb in the planting hole with the pointed tip facing up. Cover with soil and gently firm down to fill any pockets of air.
Find all you need to grow the best varieties of spectacular spring flowering bulbs, whether indoors and out in the garden, in one place at our spring flowering bulb hub page.