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Salvia farinacea

Decorative sage

Common names: Dusty sage, Blue sage

At a glance

Light
Full sun
Pot size
from 10 l
Lifespan
Annual
Hardiness
Cold damage below −2 °C
Water need
Low
Decorative sage

This description was machine-translated.

Description

The decorative sage produces upright, deep blue to violet flower spikes that create bold color accents and blooms continuously from July to October. In our climate it is grown as an annual, is drought tolerant, and is an excellent attractant for bees and bumblebees. It looks lovely in beds and containers.

Care instructions

Sow the seeds in early March indoors and transplant after the last frost (mid‑May) to a full‑sun, well‑drained site. Water sparingly; the plant tolerates dry conditions and dislikes waterlogging. Remove spent flower spikes to encourage continuous blooming until frost.

The care notes were machine-translated from German.

Garden year

SowingMar–Apr

HarvestJul–Sep

Germination

Soil temperature
from 15 °C, ideally 22 °C
Days to sprout
10 to 21 days
Light
Sprouts in light or dark
Sowing depth
0.5 cm
How to start
Start indoors, then plant out

Soil & site

Soil pH

4.0pH 6–7.58.0

Soil type

sandy, well-drained, humus-rich, nutrient-rich

LightFull sun
Hours of sunat least 6 h a day
HardinessFrost-sensitive
Water needLow

Mealycup sage likes loose, well-drained garden soil without waterlogging, ideally nutrient-rich and humus-rich, with some sand worked in so that water drains away quickly. It tolerates neutral to slightly calcareous soils well; in a tub, a mix of good potting compost, compost and sand is suitable.

Feeding

Medium feeder

Months

Mar–May

In the bed, it is enough to work compost and horn shavings shallowly into the soil when planting in spring; top-up feeding is usually not needed. In a tub or balcony box, nutrients wash out faster, so there feed regularly with organic fertiliser during the growing season from spring to late summer.

Overwintering

Mealycup sage does not tolerate frost: in the bed, treat it like an annual and sow anew in spring or buy young plants. If you want to keep it for several years, bring the tub to a bright, cool place (approx. 15 to 18 °C) before the first frost, water only moderately and put it back outdoors only after the Ice Saints in mid-May.

Propagation

Methods

  • From seed
  • Cuttings

Sowing (main method): Sow Salvia farinacea indoors or in a greenhouse from early to mid-March. The seeds need light to germinate: press them on lightly and do not cover them with soil. At about 18 to 22 °C the seed germinates after roughly 10 to 20 days. Keep the seed compost evenly moist; because it is a light germinator, it is better to mist the surface than to water from above, or to water from below. A transparent cover keeps the humidity high until germination. Once the seedlings are strong enough (after about four weeks), prick them out into small pots. From the end of April, gradually acclimatise the young plants to the outdoors (hardening off). Plant out only after the last frost, so after mid-May; note the Ice Saints (mid-May · week 20).

Cuttings (for keeping a variety / overwintering): In spring or summer, cut off non-flowering shoot tips 8 to 12 cm long. Remove the lower leaves and insert the cutting into moist, free-draining substrate (e.g. seed compost or a sand-and-soil mix). Place it bright but not in full sun, and warm (around 20 °C). Roots usually form within 2 to 4 weeks. Cuttings you want to bring through the winter you keep indoors until after the last frosts in a bright place at least 15 °C warm; outdoors, Salvia farinacea is not hardy here in Central Europe.

Note: Division is not worthwhile here: in Central Europe the plant is kept as a non-hardy summer flower and does not form a rootstock that divides well.

Companion planting

Good neighbors

nightshade family (Solanaceae)

particularly well established

You will find that basil next to tomato and pepper improves taste and keeps whiteflies and aphids away.

For example PotatoTomatoSweet pepperCocktail tomatoEggplantCape gooseberry and 14 more species in the catalogue

Source: classic companion planting (DACH-Gartenpraxis)

cabbage family (Brassicaceae)

You will notice that the intense scent of basil, thyme, and others confuses the cabbage whitefly and keeps it away from the cabbage family.

For example White cabbageKohlrabiRadishKalebroccolicauliflower and 41 more species in the catalogue

Source: bio-gardening intercropping practice

Companion planting is partly traditional gardening lore. Where the reason is known, it is given.

Some of these explanations were machine-translated.

For your garden

Grow Decorative sage yourself

Gartenkern tells you when frost is coming, when to sow and when to harvest, for your location.

Notes from real gardens

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