Why a willow obelisk earns its place in the garden

There is something deeply satisfying about coaxing a bundle of humble willow rods into a handsome, sturdy plant support. In British rural gardens and allotments, the willow obelisk has long been a quiet hero. It offers a natural, renewable alternative to bamboo canes and metal frames, and it looks far more at home amongst foxgloves and lavender than any plastic-coated cage. A well-made obelisk will stand for two or three seasons, supporting runner beans, sweet peas, climbing roses, clematis, and even trailing nasturtiums. The technique borrows directly from basketry, so if you have ever woven a simple basket, you already have the skills. If not, do not worry: the method is forgiving, and the results are charmingly rustic. Best of all, you can cut your own rods from a coppiced willow patch or buy a bundle from a local grower, making this a truly home-grown country craft.

Choosing the right willow and preparing your rods

Not all willow is equal for weaving. The best rods come from species grown specifically for basketry, such as common osier (Salix viminalis) or almond willow (Salix triandra). You want long, flexible, straight rods without side branches. For an obelisk around 1.8 metres tall, you will need roughly twenty to thirty rods, each between 1.8 and 2.4 metres long. Dried rods must be soaked before use. Submerge them completely in a water butt or bath for three to seven days, depending on their thickness. They are ready when they bend easily without cracking. Fresh rods cut in winter can be used straight away, though they may sprout leaves later. Sort your rods into two piles: thicker ones for uprights and thinner, more pliable ones for weaving. Keep a sharp pair of secateurs and some natural twine to hand.

• Soak dried rods until they feel supple as leather.
• Work in the shade, as hot sun will dry rods and make them brittle.
• Discard any rods with sharp kinks or disease.
• Wear gloves if your hands are not yet hardened to willow.

Setting out the base and the first weave

Begin by marking a circle on the ground or in a large pot. A diameter of 45 to 60 centimetres works well. If you are working on soil, push eight to twelve thick upright rods into the ground around the circle, spacing them evenly. If you are using a pot, firm the rods into the compost. Now take two thin weaving rods and start a simple pairing weave at the bottom. Hold the two rods together, pass them either side of an upright, then twist them once and pass them either side of the next upright. Continue all the way round. This is the same movement used in basketry, and it locks the uprights in place. Weave three or four rows close together at the base, pressing each row down firmly with your fingers. This creates a solid, stable foot for your obelisk.

Raising the height and shaping the obelisk

As you weave upwards, gradually draw the upright rods inwards. The obelisk should taper gently towards the top, like a classic garden cloche. Space your weaving rows about 20 to 30 centimetres apart. For extra strength, switch to a three-rod waling weave every other row. To do this, take three thin rods, tuck them behind three consecutive uprights, then weave them over one, under one, over two, and so on, always keeping the weave tight. Do not worry if it looks uneven at first; willow has a way of settling into a pleasing shape. When you reach your desired height, gather all the uprights together and bind them firmly with a length of soaked willow or strong twine. Trim any excess rod ends neatly with your secateurs. A finished obelisk should feel rigid but slightly springy.

Planting up and training your climbers

Now comes the rewarding part. Position your obelisk where it will receive plenty of sun. For runner beans, plant two or three seeds at each upright base in late spring. Sweet peas prefer an early start; sow them in autumn or early spring and tie the young shoots in with soft twine. Climbing roses need a more substantial structure, so choose a compact variety such as 'Little White Pet' and tie the canes loosely to the willow. Clematis, especially the smaller alpina and viticella types, will thread themselves through the gaps without any help. Water the plants well after planting, and keep an eye on the obelisk for the first few weeks. As the stems grow, gently guide them in a spiral around the willow rather than straight up, which encourages more flowers and pods.

Keeping your obelisk sturdy and looking its best

Willow is a natural material, so it will weather to a silvery grey within a season. That patina suits a cottage garden beautifully, but you can extend its life with a little care. Check the base weave after winter storms and push any loosened uprights back into the ground. If you live in a wet, exposed part of the country, stand the obelisk in a pot with good drainage rather than directly in heavy clay. Fresh willow may sprout small green shoots; simply rub them off. After two or three years, the rods will become brittle, at which point the whole structure can be chopped up and added to the compost heap. Then, on a cold, bright winter's day, cut a fresh bundle of rods and weave a new one. It is a gentle, meditative country pursuit that keeps giving back, season after season.