Make a mini alpine garden

What to do

• Cover drainage holes at bottom of the trough with a layer of broken pot.
• Fill with compost to 12.5cm (5in) of the rim.
• Arrange plants, putting taller plants at the back and trailers at the front.
• Plant by starting at one corner and working across the trough. Fill in gaps with compost and firm.
• Finish by adding a carpet of grit over the surface.
• Tip: If using a heavy stone trough, plant it up where you want it to stand permanently.