Salvia guaranitica 'Black and Blue'
- Position: full sun
- Soil: moderately fertile, moist but well-drained soil
- Rate of growth: average
- Flowering period: August to October
- Flower colour: dark purple-blue
- Other features: softly hairy foliage
- Hardiness: half hardy (will need protection during winter)
The flower colour of this glorious perennial is quite simply breath-taking, and this coupled with the plants strong architectural presence, will ensure that heads will be turned towards the back of the border. From late summer to late autumn, 30cm long upright spikes carry sumptuously coloured purple-blue flowers, which are held at their bases by near-black calyces - hence the name 'Black and Blue'. This is a vigorous plant, but it is not fully hardy, so it will need some protection in winter. Therefore, it is ideally suited to grow near a sheltered, south facing wall.
- Garden care: To prolong flowering remove the flower spikes as soon they start to fade. Apply a generous 5-7cm (2-3in) mulch of well-rotted garden compost or manure around the base of the plant in autumn to help keep the roots warm.
Reviewed by 2 customers
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Comments about Salvia guaranitica 'Black and Blue':
Similar in habit to Armistad but with a good blue flower and lovely yellow leaf.
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Comments about Crocus Salvia guaranitica'Black and Blue':
Planted this in March, it is about half its expected height now, hasn't stopped flowering and is now late November. The colour is stunning, the structure is beautiful and I have a lot of people hinting for cuttings! I planted it next to the Salvia 'Armistad' for the contrast of the flower colours, they do look perfect together. I would highly recommend.
Have to confess I have fallen in love with Salvia's.
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Q:Is it best to cut this plant right down and leave protected overwinter? Or leave and protect as it is? If cut down, will it grow the same shape next spring or more bushy? ThanksAsked on 24/10/2016 by resi from N.Yorks
I would cut it back and protect the crown from frosts with a mulch of dry leaves, or dried bracken.
Yes next year the rootball will be a year older, so the plant could be bushier.Answered on 26/10/2016 by Anonymous from crocus
Q:Please can you advise on suitable winter protection for Salvia Black and Blue?
I garden in a fairly mild spot (200m from the sea in the East Neuk of Fife, windy but rarely very cold or very warm) and the salvias would be planted in free draining loamy soil, about a metre from a SW facing big sandstone wall. Would the salvias need protection and, if so, what would be the best form? I'm worried about piling on compost for protection, in case winter wet would be a problem.
Thank youAsked on 27/9/2016 by orangejemmy from East Neuk of Fife
It is difficult to say with any certainty the degree of protection needed as each garden forms its own unique microclimate. I would say however that the combination of cold and wet is the real killer of these plants, so it is crucial that the plant does not get waterlogged for any length of time in winter. I would also advise applying a generous dry mulch - something like straw, that wont hold moisture, but will offer some insulation.Answered on 29/9/2016 by Helen from crocus
Q:Will this grow in well drained clay soilAsked on 20/4/2016 by Dobbo from Essex
Ideally this plant will be happiest in moderately fertile, moist but well-drained soil, so if you have very freely draining soil you should dig i lots of composted organic matter before yo plant and make sure it is kept relatively well watered.Answered on 25/4/2016 by Helen from crocus
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