The best compost to use is a loam-based John Innes No 3 to which 10 to 20 percent multi-purpose compost or very well-rotted manure may be added for richness. Position the container before filling with compost as it may be too heavy to move once planted up.
Roses love sunshine and should receive sun for at least half the day. However it is important that container-grown plants do not dry out or they will become prone to powdery mildew. If possible position the container so that it is shaded for part of the day, leaving the plant itself in full sun.
Ideally pot up plants in November using bare-root plants, but container-grown plants will do as well, and can be potted up any time between October and April.
- Drainage: Keep the pots raised on feet and add a drainage layer of gravel at the bottom to ensure good winter drainage
- Feeding: Roses use up food reserves quickly and grow better if top-dressed each spring with a granular rose fertiliser. Additional feeding may be required as per the manufacturer's recommendations. Avoid feeding after August as soft growth may be damaged by cold winters
- Mulching: Mulch with a 5cm (2in) top-dressing of well-rotted garden compost or manure to help retain moisture and enrich the compost
- Top-dressing: Every second year, remove the top 5cm (2in) of compost and replace with a fresh layer
For pruning roses, see below;
Rose pruning: climbers
Rose pruning: ramblers
Rose pruning: patio and miniature roses
Rose pruning: ground cover roses
Rose pruning: general tips
Rose pruning: shrub roses
Rose pruning: floribunda and hybrid tea
Mulches and mulching