Most gardeners treat a spring container as a single event: buy a bag of daffodils, cram them in, wait, enjoy for a fortnight, then stare at a pot of dying foliage. It doesn't have to be that way. By copying the way bulbs naturalise in the wild — big ones deep, small ones shallow — you can build a single pot that produces flowers in waves from late winter right through to the end of May.
The principle is simple. Bulbs need to sit at roughly two to three times their own depth. A daffodil wants 15cm of compost above it; a crocus is happy with 5cm. So if you plant the largest bulbs at the bottom of the pot and work upwards in decreasing size, each layer gets exactly the depth it wants. The small bulbs near the surface flower first, while the big ones below are still pushing roots and shoots through the gaps.
Think of it as casting a play. You need a late act, a middle act and an opening number. For a pot 35–45cm deep, a reliable cast looks like this:
Don't mix more than four or five varieties in one pot. Three well-chosen types, with a little overlap in flowering time, will carry you further than a chaotic jumble.
Depth matters more than width, but width helps. A pot 40cm across and 40cm deep will hold roughly 60–80 bulbs comfortably and insulate the roots far better than a narrow column. Terracotta looks lovely but dries out and cracks in hard frost; glazed ceramic or a good frost-proof composite is more forgiving.
Always use drainage material — crocks, gravel or broken polystyrene — over the holes, and raise the pot on feet or bricks so water never sits underneath. For compost, a peat-free multi-purpose mixed with a couple of handfuls of horticultural grit works well. If your pot is tall and top-heavy, use a loam-based compost such as John Innes No. 2 for weight and stability.
Work from the bottom up and don't rush it. Start with about 8cm of compost in the base, then firm it gently.
Water thoroughly once and label the pot. A wooden plant label with the varieties listed will save you guessing in March.
From October to February the pot needs very little. Keep it outdoors in a sheltered spot, out of the worst of the wind, and let the rain do the work. If we get a long dry spell, water sparingly — bulbs rotting in sodden compost are a bigger risk than drought. Move pots against a house wall during hard frosts if you can.
As soon as you see shoots, start watering more freely. The first crocus will appear, followed a fortnight or so later by iris and muscari. By the time the daffodils open, the small bulbs are fading — that's fine, just let the foliage die back naturally. The hyacinths and tulips then take over, extending the display well into May.
Once flowering finishes, deadhead promptly to stop the bulbs putting energy into seed. Leave the foliage for at least six weeks until it yellows, and feed fortnightly with a high-potash liquid feed. Tulips are often best treated as annuals in containers, but daffodils, crocus, muscari and iris will happily repeat if you let them die back properly.
In early summer, either tip the whole lot into a spare bit of border and let them settle in, or knock the bulbs out, dry them somewhere airy and store them in a labelled paper bag until September. Then start again. One good pot, planted properly in autumn, is worth a dozen hurried ones.
The Seasonal Plot shares practical, down-to-earth guidance on british seasonal gardening and outdoor living for readers across the UK.
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