Line a Wicker Basket for Tulip Bulbs with a Hessian Liner and 5 Centimetres of Grit

A standard willow basket sold for log storage or laundry, roughly 35cm across and 25cm deep, holds about 15 to 20 tulip bulbs at the usual spacing of two bulb-widths apart. The weave is the first problem. Gaps of 3mm to 8mm between the withies let dry potting compost spill out whenever the basket is moved, and wet compost slumps against the sides and pushes through the weave. Hessian, sold in garden centres in metre-square sheets or off the roll, closes those gaps while still letting water pass. It rots within a season or two, which fits a single tulip display, since many people lift or discard the bulbs after flowering.

Cut the hessian generously. For a 35cm basket, use a square of about 60cm so the fabric reaches the full inner wall and folds over the rim by 4cm to 5cm. Press it into the corners without stretching it tight across the base curve, because settling compost can tear the fabric at that bend.

Liner, grit, and drainage

Horticultural grit is crushed stone graded to roughly 2mm to 6mm. A 5cm layer across the base creates a zone where water runs through quickly and air can remain between the particles.

Tulip bulbs rot from the basal plate up when they stand in saturated compost through a wet British or northern European autumn. The grit layer raises the bulb bases above the wettest part of the basket.

Broken terracotta crocks are often used because that advice circulated for decades. Trials by the Royal Horticultural Society found that a single large crock over a drainage hole can block flow and create a perched water table above it, leaving water held in the compost.

A basket drains across its whole base through the weave and the hessian. For that kind of container, an even layer of grit suits the base better than a handful of pot shards.

Use washed grit. Builders’ sand and unwashed aggregate carry lime and fine silt, and those fines clog the spaces between stones. A 5cm layer in a 35cm basket takes roughly four litres of grit, which is one small bag.

Compost and planting depth

Bulbs carry their own first season of energy inside them. The compost is there mainly for anchorage, moisture buffering, and root run, with feeding playing a smaller role.

A loam-based mix holds structure better than peat-free multipurpose alone, which collapses and compacts in a container within weeks. Mix two parts John Innes No. 2 with one part multipurpose potting compost and one part of the same horticultural grit used at the base. The grit through the body of the compost keeps the mix open.

John Innes seed compost is worth naming because it is easily confused with the numbered potting grades. It is a low-nutrient sterilised mix meant for germinating seed. Tulips want the fertility and loam body of John Innes No. 2 or No. 3. The numbering indicates nutrient level and formulation, and the bag will state which grade it contains.

Fill the basket to within 4cm of the rim. Set the bulbs pointed end up, press them lightly into the surface, then cover with compost so the tip sits about 10cm below the finished surface. A rough rule is to bury a bulb at three times its own height. In a 25cm basket with 5cm of grit and a 10cm planting depth, that leaves a workable margin.

Watering, terracotta, and micro-irrigation

Give the basket one good soak after planting, then leave it. Autumn rain usually supplies the rest until growth appears in late winter. Overwatering at this stage does more damage than neglect, because the bulb is dormant and the roots are only starting to grow down into the grit.

A lined wicker basket retains moisture better than unglazed terracotta. An unglazed terracotta pot wicks moisture out through its wall and evaporates it, so the compost inside dries from the edges inward and needs watering more often, sometimes twice as often as a plastic or glazed container of the same size.

The lined wicker basket behaves more like plastic on its inner face because the hessian and compost hold moisture against the weave. At the base, it still drains freely through the grit. That means the basket does not need the moisture-control tactics used for terracotta, such as double-potting or a saucer of water to stop a summer plant drying to a crisp.

Drip irrigation for containers, the kind sold as a Hozelock or Gardena micro-kit with a timer and 4mm feeder lines, is excessive for an autumn-planted basket that should stay on the dry side. Those kits earn their keep on summer patio pots that dry out in a day of sun. Dormant bulbs are a poor use for the timer and emitters; save that kit for the tomatoes.

Second-year limits

The practical limit of a wicker basket is its second year. The willow starts to break down once it has held wet compost through a full winter, and the hessian is often already gone by spring.

Tulips are frequently treated as near-annuals in containers anyway. After flowering, the bulbs split into smaller offsets, and the display in year two is thinner and shorter. The short life of the liner and the basket matches the way container tulips commonly perform.

A longer-lasting container points toward recycled plastic. Elho makes recycled planters, including the Vibia Campana and green-basics lines, moulded from post-consumer plastic with built-in drainage feet and a water reservoir on some models. They cost more than a willow basket up front, around 15 to 30 euros depending on size, yet they hold their structure for years. Their drainage design also allows the hessian to be skipped and the grit layer reduced to 2cm to 3cm.

After the leaves yellow, bulbs need a different routine from many other container plants. Reviving a root-bound houseplant often means teasing out a circling root ball and repotting into fresh compost. Spent tulip bulbs are lifted, dried, and either stored or discarded.

Overwintering tender perennials such as fuchsias or pelargoniums in the same shed uses another regime again: barely moist and frost-free. Bulbs need cold to trigger spring growth. The basket, the perennials, and the houseplants each need separate treatment, and most container losses begin when they get the same shelf and the same watering can.

Squirrels

A grit layer manages water. It does nothing about squirrels, which can dig tulip bulbs out of a soft basket surface within days of planting. A square of chicken wire pressed over the compost, or a thorny prunings mulch, deals with that separately.

Scaling to a 45cm basket

For a 45cm trug-style basket, 30cm deep, the numbers change. A 5cm base layer takes around six to seven litres of grit. The compost body above it, filled to within 4cm of the rim, needs roughly 25 litres of the John Innes and multipurpose blend. A single 40-litre bag of John Innes No. 2 stretched with grit and multipurpose covers it with margin.

Bulb count follows surface area more than depth. A 45cm basket takes 25 to 30 tulip bulbs at the same two-bulb-width spacing. It can also be planted as a lasagne arrangement, with a deeper tier of tulips at 12cm covered with compost, then a shallower tier of crocus or muscari at 6cm above them. Each tier flowers in sequence.

The hessian for this size should be an 80cm square so it can climb the taller wall and fold over the rim. Wet compost adds weight, close to 20kg once soaked, which matters before the basket is placed somewhere awkward to lift.

In the shallow version, the lower tulips can rise through the upper crocus or muscari before the smaller bulbs have finished, so the neat sequence shown for deeper borders is less tidy in a basket.