Perennial salvias are late summer border superstars. They start flowering around midsummer and then just... keep going. With wonderful, clear colours that change as the days shorten, salvias bring life and vigour to borders that beginning to look a bit tired. They are necessarily completely hardy so if you can, plant them in a warm border in well-drained soil with shelter from cold winds. If you can't, then grow your salvias in pots. You can place those around the border and bring them into warmer place to over-winter.
The trick to maximise flowering is to prune Salvias twice. Leave them to overwinter and then cut them back in April to new growth. They will flower in June. Then - for those of you familiar with the Chelsea Chop - here is the Hampton Hack. Around the time of the Hampton Court Flower Show, in early July, cut them back by about a third to promote the formation of masses of new flower buds which will perform from August until the first frosts. One of the longest flowering seasons of anything in our range of UK grown herbaceous plants
Salvias look great when planted together with Artemesias, grasses, Lavenders, Penstemons and Verbena bonariensis,