perennial

Sticky Jerusalem Sage

The Story

Plant Bio

Phlomis viscosa is a perennial herb known for its tall, upright growth and dense clusters of tubular flowers.

It is particularly valued for its drought resistance and ability to thrive in poor soils, making it a great choice for Mediterranean-style gardens.

Uses & Benefits:

Adds aromatic, silvery foliage and yellow flowers, enhancing garden texture and scent.

Drought-tolerant, requiring minimal watering once established.

Supports pollinators like bees and butterflies.

Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9, 10

Water

Low to moderate

Humidity

Average

Lifespan

Perennial

Native To

Mediterranean region

Toxicity

Non-toxic to humans and pets

Bloom period

Early summer – Mid-summer

In flower about 2 months of the year

Planting

How to Grow

Select well-drained sandy or loamy soil for planting.
Tuck seeds just below the soil surface in early spring.
Water regularly to keep soil moist but not waterlogged for 6 weeks.
Transplant seedlings outdoors after the last frost date.
Mist cuttings in a humid environment for root development in 4-6 weeks.
Apply a balanced fertilizer in early spring to promote growth.

Pro Tip

Ensure excellent drainage to prevent root rot and promote healthy growth.

Keep It Thriving

Care Guide

Do

Water deeply during dry spells 🌱
Prune after flowering to maintain shape
Apply mulch to conserve moisture

Don't

Avoid overwatering to prevent root rot ❌
Do not fertilize late in the season
Keep away from heavy clay soils

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Propagate
Spring Cleanup
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Aromatic herb borderWildflower meadow accentDry rock garden feature

Companion Plants

Lavender Salvia Coreopsis Sedum Echinacea

Multiply

Propagation Methods

Good to Know

Common Questions

Sticky Jerusalem Sage questions

What zones can Sticky Jerusalem Sage grow in?

Sticky Jerusalem Sage is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Sticky Jerusalem Sage deer resistant?

Yes — Sticky Jerusalem Sage is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Sticky Jerusalem Sage bloom?

Sticky Jerusalem Sage typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Sticky Jerusalem Sage need full sun?

Sticky Jerusalem Sage does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Sticky Jerusalem Sage drought tolerant?

Yes — once established (usually after the first full season), Sticky Jerusalem Sage handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.