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TL;DR — Quick Summary
Quick Facts
| Classification | Salvia x jamensis |
| Hardiness | RHS H5 — reliably hardy throughout most of the UK |
| Flower colour | Deep midnight-purple — near-black in lower light |
| Flowering season | May to first frosts |
| Height | 60–80cm |
| Key advantage | Hardy dark salvia — rare combination |
| Pruning | Cut back spring only; Hampton Hack July |
| Companion plants | White agapanthus, silver artemisia, white cosmos |
Salvia ‘Nachtvlinder’ means “night butterfly” in Dutch — and the name captures something real about the variety. The flowers are a deep midnight-purple that reads as almost black in certain lights, particularly in the lower light of late afternoon and evening. In full sun they reveal their true deep purple tone; in shade or dusk they disappear into near-darkness.
What makes Nachtvlinder truly remarkable for a salvia of this character is its hardiness. Most dark-flowered salvias with this kind of depth and drama are tender. Nachtvlinder holds the RHS H5 hardiness rating — it is reliably hardy throughout most of the UK without any winter protection whatsoever.
RHS H5 Hardy
The combination of extreme flower darkness and genuine hardiness is almost unparalleled in the salvia world. Most salvias with the deepest, most dramatic colours — guaranitica, involucrata, discolor — are tender and need careful overwintering management. Nachtvlinder delivers its dark drama without any of that concern. Plant it in autumn and it will return reliably every spring throughout most of the UK.
It is classified as a Salvia x jamensis variety, which means it shares the same long flowering season as the Lips series — flowering from May right through to the first frosts. This makes it one of the longest-flowering dark salvias available. The compact, bushy habit reaches around 60–80cm and it is self-supporting without staking.
☀ Position
Full sun brings out the best flower colour and maximises flowering. In partial shade the flowers are fewer but the dark colour reads as even more dramatic against the lower light. Free-draining soil is important — Nachtvlinder shares the same root requirements as all jamensis salvias despite its superior hardiness.
❄ Hardiness
RHS H5 — reliably hardy throughout most of the UK including northern England and Scotland. This is exceptional for a salvia of this character. No winter protection needed in most UK gardens — leave old stems on through winter and cut back in spring once new growth appears at the base.
✂ Pruning
Cut back in spring once new growth is visible — typically late March to April. Do not cut back in autumn. Deadhead every two to three weeks through the season. A light Hampton Hack trim in early July encourages a strong late-summer flush. See our pruning guide.
💧 Feeding
Feed fortnightly with high-potash liquid fertiliser from May to September. Avoid high-nitrogen feeds which produce leafy growth at the expense of the dramatic flower display that makes this variety special.
The near-black flowers of Nachtvlinder are most effective against pale, light and silver companions that provide maximum contrast. The variety also works in all-dark schemes where the flower tone echoes dark foliage.
White agapanthus
The clean white of agapanthus against near-black salvia flowers is one of the most dramatic contrasts possible. Both love full sun and free-draining conditions.
Silver artemisia
Grey-silver foliage grounds the dark flowers and prevents the planting from looking heavy. Artemisia 'Powis Castle' flows around the base beautifully.
White cosmos
Airy white cosmos creates a light, romantic contrast to the dark solidity of Nachtvlinder's flower spikes. The movement of cosmos adds life to the combination.
Purple dark nemorosa
Salvia nemorosa 'Caradonna' at the front with Nachtvlinder behind creates a tonal gradient from deep purple to near-black — sophisticated and cohesive.
Black grass — Ophiopogon
An all-dark scheme: Ophiopogon planiscapus 'Nigrescens' (black grass) beneath Nachtvlinder, with silver stachys as the only lighter note. Dramatic and contemporary.
Pale pink roses
The soft, pale pink of a blush rose against near-black salvia flowers is romantic and unusual. Best in late summer when Nachtvlinder is at its peak.
Salvia 'Nachtvlinder' UK is available from Middleton Nurseries — one of the most distinctive and hardiest dark salvias available. Grown at our Staffordshire nursery using peat-free compost and dispatched nationwide.
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