"Most plants that have catkins are wind-pollinated. That is, the pollen grains are simply released on the breeze and the plants count on chance to bring some of their pollen to rest on stigmas of their own species. Close relatives of the willows, the poplars (Populus spp.), all spread their pollen in this manner."
It depends on your space and taste, of course, but consider the attributes of this fast-growing, low maintenance shrub. Willow is easily propagated from cuttings, requires only moderate watering, little or no fertilizer, and offers interest throughout the seasons.
The varieties available to us are generally native to or developed from subspecies from northern Europe. Several varieties are hardy to Zone 3 or 4. Southern British Columbia's Bluestem Nursery – which lists over 50 varieties in its online catalogue – is a great place to learn more.
I'll highlight two varieties.
As they note at Bluestem Nursery, Salix caprea "produces an abundance of nectar and pollen on its many fat catkins" which are very attractive to bees. As willows bloom early, they are an important food source for wild bees and honeybees as they begin to forage in spring. S. caprea is also one of the famous pussy willows used in the floral trade. This shrub can grow 10 to 15 feet and become quite bushy. As a landscape addition, it can be placed in the garden, grown as a large foundation anchor or serve as a solitary accent.
French Pussy Willow's cousin, Salix discolor, is the native willow we see in many areas of Canada. It is almost as showy and reliably hardy to Zone 2.
What is coppicing?
The term 'coppicing' is associated with the commercial cultivation of willows, but it is a pruning technique that can be applied to willows in the home garden too. Coppicing is the practice of pruning right to ground level to force new shoots or rods to grow from the crown. Willows respond to this severe pruning with vigorous growth, producing rods of 4 to10 ft in a season. Coppiced willows are excellent as a screen.
In many areas of Canada, crafters have explored willow furniture making, but living structures – which are common in Britain and France – are another matter. Maybe we need to get more adventurous. Wouldn't you love to encourage a willow fence – called a 'fedge' – in your yard?
Visit Bluestem Nursery for the landscape uses of willow.
Visit JPR Environmental in Britain to see ideas for living willow fences, arbours, and sculpture.