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Holy Flax

Santolina rosmarinifolia
💬 Read 1 community post
Edible value5Medicinal value3Other uses1
Shrub0.7×1 mzone 7–10full sun

Will it grow where I live?

Holy Flax is hardy to zone 7: lowlands, river valleys and cities across Central Europe are fine, harsher continental or upland sites need winter protection or a container.

Or check it for your location right here:

Winter hardiness by USDA zone, summer warmth by heat sum – the same values the app and the plant finder use.

Profile

Family
Asteraceae
Habit
Shrub
Height
0.7 m
Spread
1 m
Growth
medium
Lifespan
10 years
First yield
after 1 year
Hardiness
zone 7–10
Shade tolerance
full sun
Soil
Sand, Silt
Soil moisture
very dry – moist
pH
5.3 – 8.6
evergreensuitable for hedgesground coverscentednectar sourcepollen source

Flowering & harvest

J F M A M J J A S O N D
Fruit harvest

Times apply to the northern hemisphere in a temperate climate and shift with altitude and cultivar.

Uses

Edible5 of 10
Medicinal3 of 10
Other uses1 of 10

Growing

Santolina rosmarinifolia prefers a sunny location with well-drained, dry soil. The plant is drought-tolerant and only requires occasional watering, especially during dry periods. To rejuvenate and prevent woodiness, it should be pruned in late winter or early spring. Propagation is best done by cuttings or seeds.

Frequently asked questions

Holy Flax: how big does it get?

Holy Flax (Santolina rosmarinifolia) grows as a Shrub and reaches roughly 0.7 m in height when mature, with a spread of about 1 m. Growth is medium.

Holy Flax: what site does it need?

Holy Flax tolerates full sun. Suitable soils are Sand, Silt. Soil moisture should be in the range very dry – moist. The pH may lie between 5.3 and 8.6.

Holy Flax: is it hardy?

Holy Flax is listed as hardy in zone 7–10 and survives normal winters outdoors there.

Holy Flax: will it grow in Central Europe?

Holy Flax is hardy to zone 7: lowlands, river valleys and cities across Central Europe are fine, harsher continental or upland sites need winter protection or a container.

Holy Flax: when is it harvested?

In a temperate northern-hemisphere climate the fruit ripens in June.

Holy Flax: is it poisonous?

Individual parts of Holy Flax are noted as mildly problematic — the plant does not count as poisonous. With wild plants, never rely on a database alone, only on a confident identification.

Holy Flax: what is it used for?

Rated on a scale up to 10: Edible 5/10, Medicinal 3/10, Other uses 1/10.

Community experience

What Permaplans users wrote about this plant – taken from the app as is. 1 post.

Lena 13 August 2026

In Polen, wird die Pflanze als "Olivenkraut" auf dem Markt verkauft, wie Currykraut oder Thymian etc.. Die Pflanze blüht Ende Juli, Anfang August gelb. Die kleinen röhrenförmigen Blätter werden in kleinen Mengen frisch oder getrocknet zum Würzen verwendet. Als Alternative geeignet, um Oliven-Geschmackt zu schaffen. Laut Texten im Internet auch für medizinische Zwecke verwendbar. Habe ich allerdings noch nicht ausprobiert, bspw. als Tee.

Photo by Lena of Holy Flax

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