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- Gold Medal Winners
- Established 1945. Over 75 years experience
- 100% Customer Satisfaction
Gold Medal Winners
Established 1945. Over 75 years experience
100% Customer Satisfaction
Renowned for its bold structure and eye-catching blooms, Allium ‘Globemaster’ is widely considered the most architectural and impressive of all ornamental onions. Towering at over 1 metre (3.3 feet) tall, it produces enormous, globe-shaped flower heads made up of densely packed, star-shaped bright purple florets — forming striking 'pom-pom' blooms that can measure up to 25cm (10 inches) in diameter.
Flowering from early to mid-June, ‘Globemaster’ blooms slightly later than other alliums, bridging the gap between spring and summer colour. Its towering form and massive blooms make it a focal point in any garden, perfect for planting in groups at the back of borders, alongside ornamental grasses, or in contemporary schemes where structure and symmetry are key.
What sets ‘Globemaster’ apart isn’t just its size — it also holds its colour well and blooms for several weeks, offering a long-lasting display. Even after flowering, the decorative seed heads add continued visual interest and are ideal for cutting or drying.
Loved by pollinators and gardeners alike, Allium ‘Globemaster’ is both a low-maintenance and high-impact choice that returns reliably year after year.
How to plant Alliums
- Plant Alliums in the Autumn for Spring flowering.
- Choose a location to plant your Allium Bulbs, they like to be in full sunlight and well-drained soil.
Planting Alliums in the Garden
- Once you have found the perfect spot in your garden to grow your Alliums, you need to dig holes in the flower bed that are three times the diameter of the bulb. For example, if the bulb is 5cm (2") in size then it needs to be planted 15cm (6") deep.
- Plant the bulbs about 20-30cm (8-12") apart. For impact, plant in groups.
- Alliums work well in rockeries and crowded gardens as they don't take up much space.
- Add horticultural grit to heavy soil to improve water drainage.
- The Allium bulbs need to be planted pointy end up.
- Water the bulb well once in situ.
- To help the soil drain well it is also beneficial to spread mulch, wood chips and organic matter over the entire planting area.
- Alliums will flower around May/June.
- Cut the Alliums back at the end of their blooming season. They will then continue to grow in your garden year on year with very little maintenance.
Planting Alliums in Pots
- Plant Alliums the same depth for pots as in the garden. Plant three times the diameter of the bulb. For example, if the bulb is 5cm (2") in size then it needs to be planted 15cm (6") deep.
- For a garden with limited space, you may want to produce a fuller pot display of spring flowers by layering your bulbs like a lasagne. Simply plant your bulbs deeper to start with, with the largest or latest flowering bulbs further down, moving to the smallest and earliest flowering in the top layer. The shoots from the lower bulbs will find their way around the other bulbs. If you are planting the Alliums first, allow 10cm (4") of soil underneath the bulbs.
- Use a good-quality, multipurpose compost.
- Add horticultural grit to heavy soil to improve water drainage.
- The Allium bulbs need to be planted pointy end up.
- Water the bulb well once in situ.
- To help the soil drain well it is also beneficial to spread mulch, wood chips and organic matter over the entire planting area.
- Alliums will flower around May/June.
- Cut the Alliums back at the end of their blooming season. They will then continue to grow in your garden year on year with very little maintenance.
Globemaster Description
Renowned for its bold structure and eye-catching blooms, Allium ‘Globemaster’ is widely considered the most architectural and impressive of all ornamental onions. Towering at over 1 metre (3.3 feet) tall, it produces enormous, globe-shaped flower heads made up of densely packed, star-shaped bright purple florets — forming striking 'pom-pom' blooms that can measure up to 25cm (10 inches) in diameter.
Flowering from early to mid-June, ‘Globemaster’ blooms slightly later than other alliums, bridging the gap between spring and summer colour. Its towering form and massive blooms make it a focal point in any garden, perfect for planting in groups at the back of borders, alongside ornamental grasses, or in contemporary schemes where structure and symmetry are key.
What sets ‘Globemaster’ apart isn’t just its size — it also holds its colour well and blooms for several weeks, offering a long-lasting display. Even after flowering, the decorative seed heads add continued visual interest and are ideal for cutting or drying.
Loved by pollinators and gardeners alike, Allium ‘Globemaster’ is both a low-maintenance and high-impact choice that returns reliably year after year.
Additional Information
Delivery / Returns
Spring Flowering Bulbs are delivered in the Autumn
Delivery and P&P
Spring Flowering Bulbs are dispatched from September to November.
All orders should be dispatched within 3-5 working days during this time. (Unless otherwise stated on the Shipping est.)
Postage cost to mainland UK (excluding N.Ireland, Highlands and Isles) is £4.99.
All out of area postcodes are charged at £9.50.
Orders over £60 qualify for FREE delivery to mainland UK (excluding N.Ireland, Jersey, Guernsey, Highlands and Isles).
Unfortunately, we are not currently delivering to the EU. See Delivery page.
When your order is due for dispatch, you will receive a tracking email from us to track your parcel.
Your parcel will be sent on a 48 hour tracked service with Yodel.
Returns and Refunds
You have the right to cancel your order at any time before it is dispatched.
All returns must be returned at your cost within 7 days of receipt.
Payment for the returned goods will be refunded within 7 days of the goods being received by us, less the postage charges.
Planting & Growing Instructions
How to plant Alliums
- Plant Alliums in the Autumn for Spring flowering.
- Choose a location to plant your Allium Bulbs, they like to be in full sunlight and well-drained soil.
Planting Alliums in the Garden
- Once you have found the perfect spot in your garden to grow your Alliums, you need to dig holes in the flower bed that are three times the diameter of the bulb. For example, if the bulb is 5cm (2") in size then it needs to be planted 15cm (6") deep.
- Plant the bulbs about 20-30cm (8-12") apart. For impact, plant in groups.
- Alliums work well in rockeries and crowded gardens as they don't take up much space.
- Add horticultural grit to heavy soil to improve water drainage.
- The Allium bulbs need to be planted pointy end up.
- Water the bulb well once in situ.
- To help the soil drain well it is also beneficial to spread mulch, wood chips and organic matter over the entire planting area.
- Alliums will flower around May/June.
- Cut the Alliums back at the end of their blooming season. They will then continue to grow in your garden year on year with very little maintenance.
Planting Alliums in Pots
- Plant Alliums the same depth for pots as in the garden. Plant three times the diameter of the bulb. For example, if the bulb is 5cm (2") in size then it needs to be planted 15cm (6") deep.
- For a garden with limited space, you may want to produce a fuller pot display of spring flowers by layering your bulbs like a lasagne. Simply plant your bulbs deeper to start with, with the largest or latest flowering bulbs further down, moving to the smallest and earliest flowering in the top layer. The shoots from the lower bulbs will find their way around the other bulbs. If you are planting the Alliums first, allow 10cm (4") of soil underneath the bulbs.
- Use a good-quality, multipurpose compost.
- Add horticultural grit to heavy soil to improve water drainage.
- The Allium bulbs need to be planted pointy end up.
- Water the bulb well once in situ.
- To help the soil drain well it is also beneficial to spread mulch, wood chips and organic matter over the entire planting area.
- Alliums will flower around May/June.
- Cut the Alliums back at the end of their blooming season. They will then continue to grow in your garden year on year with very little maintenance.
Care Instructions
How to care for Alliums
- Add a potash feed to enhance growth and strengthen the bulbs for flowering year after year.
- Allow flower to die back and remove any dead foliage in early Summer.
- Remove any dead stems that become detached from their bases.
- Alliums are hardy and can therefore be left in the ground all year round.
- Keep an eye out for any diseased foliage.
- Seldom need support.
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Description
Renowned for its bold structure and eye-catching blooms, Allium ‘Globemaster’ is widely considered the most architectural and impressive of all ornamental onions. Towering at over 1 metre (3.3 feet) tall, it produces enormous, globe-shaped flower heads made up of densely packed, star-shaped bright purple florets — forming striking 'pom-pom' blooms that can measure up to 25cm (10 inches) in diameter.
Flowering from early to mid-June, ‘Globemaster’ blooms slightly later than other alliums, bridging the gap between spring and summer colour. Its towering form and massive blooms make it a focal point in any garden, perfect for planting in groups at the back of borders, alongside ornamental grasses, or in contemporary schemes where structure and symmetry are key.
What sets ‘Globemaster’ apart isn’t just its size — it also holds its colour well and blooms for several weeks, offering a long-lasting display. Even after flowering, the decorative seed heads add continued visual interest and are ideal for cutting or drying.
Loved by pollinators and gardeners alike, Allium ‘Globemaster’ is both a low-maintenance and high-impact choice that returns reliably year after year.
- Additional Information
- Reviews (2)
- Delivery / Returns
- Planting & Growing Instructions
How to plant Alliums
- Plant Alliums in the Autumn for Spring flowering.
- Choose a location to plant your Allium Bulbs, they like to be in full sunlight and well-drained soil.
Planting Alliums in the Garden
- Once you have found the perfect spot in your garden to grow your Alliums, you need to dig holes in the flower bed that are three times the diameter of the bulb. For example, if the bulb is 5cm (2") in size then it needs to be planted 15cm (6") deep.
- Plant the bulbs about 20-30cm (8-12") apart. For impact, plant in groups.
- Alliums work well in rockeries and crowded gardens as they don't take up much space.
- Add horticultural grit to heavy soil to improve water drainage.
- The Allium bulbs need to be planted pointy end up.
- Water the bulb well once in situ.
- To help the soil drain well it is also beneficial to spread mulch, wood chips and organic matter over the entire planting area.
- Alliums will flower around May/June.
- Cut the Alliums back at the end of their blooming season. They will then continue to grow in your garden year on year with very little maintenance.
Planting Alliums in Pots
- Plant Alliums the same depth for pots as in the garden. Plant three times the diameter of the bulb. For example, if the bulb is 5cm (2") in size then it needs to be planted 15cm (6") deep.
- For a garden with limited space, you may want to produce a fuller pot display of spring flowers by layering your bulbs like a lasagne. Simply plant your bulbs deeper to start with, with the largest or latest flowering bulbs further down, moving to the smallest and earliest flowering in the top layer. The shoots from the lower bulbs will find their way around the other bulbs. If you are planting the Alliums first, allow 10cm (4") of soil underneath the bulbs.
- Use a good-quality, multipurpose compost.
- Add horticultural grit to heavy soil to improve water drainage.
- The Allium bulbs need to be planted pointy end up.
- Water the bulb well once in situ.
- To help the soil drain well it is also beneficial to spread mulch, wood chips and organic matter over the entire planting area.
- Alliums will flower around May/June.
- Cut the Alliums back at the end of their blooming season. They will then continue to grow in your garden year on year with very little maintenance.
- Care Instructions
- Ask the Experts
- FAQs
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