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Very large Allium bulbs
I got carried away and bought 3 very large Allium bulbs and 3 just a bit smaller (white flower heads, don't know the variety) at a garden festival in Germany. They were €25, so not cheap. Found out how to plant them, depth etc but didn't ask when? Should I plant them in the garden now (June) or perhaps in pots? Any advice please.
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Plant three to four times the depth of the bulb, with a layer of grit underneath to keep it free draining. You can plant them any time between now and November, they will start to grow in Spring.
I dont think they do very well in pots unless they are very large and deep.
The white flower heads if they are big, might be "mount everest" or "Mont Blanc"
Last edited: 14 June 2016 15:54:25
I would plant them now so they don't dry out but mark the spot to avoid accidents with the border spade or fork later on.
I buy some every autumn to add to my garden stock and have planted them in borders and pots so I could sink them in gaps in the borders later on - purple sensation, sphaerocephallum, nectaroscordum, and a white one. I have a Christophii which has self seed into a pot and produced a huge flower head this year. I shall move it to a border when the flower is done.
They like a sunny, well drained site and don't do well if it's too cold or exposed or they get water-logged but are otherwise easy and gorgeous plants to grow.