Shrubby jerusalem sage (Phlomis fruticosa)

Also known as: Yellow Clary, French sage, Wild mullein

Shrubby Jerusalem Sage (Phlomis fruticosa) is a fast-growing, semi-woody evergreen plant that typically reaches heights of 91 to 122 cm. In late spring to early summer, it showcases clusters of vibrant yellow flowers that attract butterflies and hummingbirds. This drought-resistant shrub thrives in full sun to partial shade.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Shrubby jerusalem sage

Lifespan

Perennial

Plant Type

Shrub

Plant Height

1 m

Spread

1.5 m

Leaf Color

Green Gray Silver

Flower Size

5 cm to 8 cm

Flower Color

Yellow

Images of Shrubby jerusalem sage

Quickly Identify Shrubby jerusalem sage

Lance-shaped, woolly-gray leaves with white undersides, 2-3 inches (5-7.5 cm) long.

Radiant lemon-yellow flowers in distinct whorls on erect stems, 1 inch (2.5 cm) long.

Multi-stemmed, woody base transitioning to herbaceous, dense white-hairy stems, 0.4-1 inch (1-2.5 cm) diameter.

Golden yellow tubular flowers arranged in tiers with no fragrance, forming clusters of 20 blooms.

Small brown capsules less than 1 inch (2.54 cm) long, emerging in late summer to autumn season.

Scientific Classification of Shrubby jerusalem sage

Phylum

Vascular plants

Class

Dicotyledons

Order

Mints plantains olives and allies

Family

Mint

Genus

Jerusalem sage

Species

Shrubby jerusalem sage

Planting and Growing of Shrubby jerusalem sage

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

10-12 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Shrubby jerusalem sage?

When watering Phlomis fruticosa, it's crucial to ensure that the soil is thoroughly moistened but not waterlogged. Approximately 250 ml of water should be adequate per watering session, depending on the size of the plant and the current environmental conditions. The goal is to moisten the soil up to a depth of around 15 cm, which encourages root growth and prevents the roots from sitting in excess water.

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How to save an overwatered Shrubby jerusalem sage? ›

More About Watering Techniques→

What Are the Sunlight Requirements for Shrubby jerusalem sage?

Sunlight Requirements: Full sun

Duration of light: 6-8 hours

Phlomis fruticosa prefers full sun, which provides the necessary energy for optimal flowering and vigorous growth. Adequate sunlight ensures a robust and colorful display of foliage and flowers, enhancing its aesthetic appeal.

What is the best natural setting? ›

How to ensure optimal lighting indoors? ›

What signs indicate optimal lighting? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Shrubby jerusalem sage?

Ideal Temperature: 60 ~ 75℉

The ideal temperature range for Phlomis fruticosa, also known as Jerusalem Sage, is between 60°F and 75°F. This range provides the optimal conditions for growth and flowering, mimicking the plant's native Mediterranean climate. At these temperatures, the plant can efficiently perform photosynthesis, leading to healthy growth and vibrant blooms.

What Soil is Best for Shrubby jerusalem sage?

Soil type: Sandy soil, Loam, Calcareous soil

Soil PH: 6.5 ~ 7.5

Phlomis fruticosa thrives in well-drained soils that prevent waterlogging. Efficient drainage enhances the plant's root health by ensuring that excess water does not accumulate, thus preventing root rot. Though Phlomis fruticosa is not overly demanding on nutrients, a balanced, moderately fertile soil supports healthy foliage and robust flowering. Nutrient-rich soils provide essential minerals that enhance growth and vitality. This plant favors a crumbly, well-aerated soil structure that allows roots to penetrate easily and promotes optimal root development. A loose structure enhances aeration and nutrient uptake. More About Soil→

How to Fertilize Shrubby jerusalem sage?

Fertilizer type: Balanced

When fertilizing Phlomis fruticosa, use approximately half to one tablespoon of balanced liquid fertilizer per gallon of water. Ensure the fertilizer is diluted properly to avoid over-fertilization, which could harm the plant. More About Fertilizing Techniques→

How to Prune Shrubby jerusalem sage?

Pruning Time: Spring, Summer, Autumn

Start by cutting away any dead, diseased, or damaged wood to encourage new growth and improve airflow. This step is critical for maintaining a healthy plant and preventing diseases. Trim back overgrown branches to maintain a neat and desirable shape. Phlomis fruticosa tends to grow woody at the base, so shaping keeps it looking bushy and attractive. Consider cutting back the height of the plant to stimulate denser growth and control its overall size. This is particularly important if the plant becomes too leggy or overgrown. More About Pruning Techniques→

How to Propagate Shrubby jerusalem sage plant?

Propagate Time: Spring, Late spring, Early spring, Summer

To propagate via seeds, start by soaking the seeds in water for 24 hours. Sow them in seed starting trays filled with a well-draining mix. Ensure consistent moisture without waterlogging.

Select a healthy, non-flowering stem and cut a section about 12 cm long. Remove the lower leaves and dip the cut end in rooting hormone before planting it in a potting mix.

Carefully dig up the plant and divide the root ball into sections. Ensure each section has a part of the root system and several stems. Replant in desired locations promptly.

More About Propagating Techniques→

How to Repot Shrubby jerusalem sage plant?

Repotting frequency: Once every 2-3 years

Phlomis fruticosa shows signs of needing repotting when roots start peeking out of the drain holes or when growth seems stunted despite proper care. The best timing is during early spring or autumn, when the plant is neither in dormancy nor in full bloom, allowing it to establish itself in new soil comfortably.

Choosing a pot with adequate drainage and slightly larger than the current one is crucial. A pot that is too large can cause waterlogging and root rot, while one that's too small can stunt growth. A clay or terracotta pot is often ideal as it allows breathability, preventing excessive moisture retention.

The soil for Phlomis fruticosa should be well-draining, with a mix of sandy loam to mimic its natural habitat. This type of soil prevents water accumulation and provides the roots with the necessary aeration, contributing to the plant's robust health and vibrant growth.