{"id":613786550598,"date":"2025-10-16T16:41:48","date_gmt":"2025-10-16T16:41:48","guid":{"rendered":"https:\/\/blogs.ashridgetrees.co.uk\/blogs\/uncategorized\/how-plant-grow-allium-bulbs\/"},"modified":"2026-04-21T08:40:51","modified_gmt":"2026-04-21T08:40:51","slug":"how-plant-grow-allium-bulbs","status":"publish","type":"post","link":"https:\/\/blogs.ashridgetrees.co.uk\/blogs\/bulbs\/how-plant-grow-allium-bulbs\/","title":{"rendered":"How to Plant and Grow Allium Bulbs"},"content":{"rendered":"

Allium bulbs<\/a> produce spectacular starburst flowers in late Spring and Summer, after the main flush of spring flowering bulbs<\/a>.<\/p>

\"Allium<\/figure><\/div>

Planting Allium Bulbs<\/h2>

When to Plant Alliums<\/h3>

Autumn & early winter is peak dry bulb planting time.
The ideal months for planting Alliums<\/strong> are from September to mid-November<\/strong>, but as late as the middle of December is acceptable if the ground isn\u2019t frozen.<\/p>

Pot grown Alliums can be planted out in Spring, before they flower.<\/p>

Where to Plant Alliums<\/h3>

With the notable exception of Sicilian Honey Garlic<\/a>, which likes damp soil in shade, all alliums really need sun to flower well, with relatively deep, rich, well drained soil.
They tend to do well in rose beds or herbaceous borders. They will enjoy the annual mulch with everything else, but remember they originate from places with dry summer climates, so beds that get watered a lot may not be ideal.<\/p>

The Planting Process<\/h3>

It is a good idea to plant soon after receipt. They are big bulbs and lose moisture relatively quickly when out of the ground. So prepare their planting site early.
Unless your soil is already very good, adding well rotted garden compost is one of the best investments you can make for a fabulous display in May and June.<\/p>

As big bulbs, they are best planted in individual holes with a pinch of Bulb Starter Rootgrow<\/a> at the bottom. <\/p>

Planting depth<\/strong> is important; those big flower heads need to be well anchored. Plant Alliums at least three times as deep as the height of the bulb.<\/p>

Which way up do I plant the Allium Bulb? <\/h4>

The top of the bulb is pointed: if in doubt, plant it on its side. <\/p>

Planting Alliums in Pots and Containers<\/h3>

The pot should be deep, fairly large, and, crucially, the compost must be kept moist in the growing season. <\/p>

Alliums are not great grown all by themselves: their leaves are fading and look relatively unattractive just as the flowers open. <\/p>

A simple bulb lasagne<\/a> with late flowering tulips would look great.<\/p>

Alliums After They Have Finished Flowering<\/h2>