East asian sage (Salvia japonica)

Also known as: Japanese Salvia, Oriental Salvia

An annual plant originating from China, Perilla frutescens, also known as shiso, is often utilized as a groundcover in gardens. This hermaphroditic herb has leaves that can be used as a sage substitute in culinary applications. Additionally, its flowers produce a black dye.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of East asian sage

Lifespan

Perennial

Plant Type

Herb

Plant Height

30 cm to 1 m

Spread

30 cm

Leaf Color

Green

Flower Size

1-2 cm

Flower Color

Pink Purple Blue

Images of East asian sage

Quickly Identify East asian sage

To identify Salvia japonica, look for its characteristic lance-shaped leaves, square stems, and blue or purple flowers arranged in whorls. The leaves have a finely toothed margin, and the plant emits a mild fragrance when bruised.

Scientific Classification of East asian sage

Phylum

Vascular plants

Class

Dicotyledons

Order

Mints plantains olives and allies

Family

Mint

Genus

Sages

Species

East asian sage

Planting and Growing of East asian sage

Care Difficulty

Easy

Watering Schedule

Every 8 days

Sunlight Requirements

Partial sun

Sunshine Duration

4-8 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

Terracotta, Plastic

How to Water East asian sage?

When watering Salvia japonica, ensure the soil is moist but not soggy. A good rule of thumb is providing approximately 150 milliliters per watering session. The water should fully saturate the root ball, and any excess water should be able to drain out of the bottom of the pot easily.

What are the symptoms of an underwatered East asian sage? ›

What should I do if my East asian sage is not getting enough water? ›

What are the symptoms of an overwatered East asian sage? ›

How to save an overwatered East asian sage? ›

What Are the Sunlight Requirements for East asian sage?

Sunlight Requirements: Partial sun, Full sun

Duration of light: 4 to 8 hours daily

Ideal lighting conditions for Salvia japonica include partial to full sun. Proper lighting enables healthy growth, vibrant flowering, and reduces the risk of pest infestations.

What is the best lighting condition? ›

How to achieve ideal lighting? ›

What are the benefits of optimal lighting? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for East asian sage?

Ideal Temperature: 60 ~ 75℉

Salvia japonica thrives best in temperatures ranging from 60°F to 75°F. This range facilitates optimal biochemical processes, ensuring robust growth and flowering. Within this range, the plant can efficiently perform photosynthesis, leading to lush foliage and vibrant blooms.

What Soil is Best for East asian sage?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Salvia japonica requires soil rich in organic matter to thrive. Supplementing the soil with compost or well-rotted manure can greatly enhance its growth by providing essential nutrients and promoting healthy root development. Well-drained soil is crucial for Salvia japonica. Proper drainage prevents root rot and allows the roots to access oxygen, which is vital for the plant's overall health and resilience against diseases. Though it prefers well-drained conditions, Salvia japonica can benefit from soil that retains enough moisture to support continuous growth. Mulching can help retain soil moisture, reducing the need for frequent watering.

How to Fertilize East asian sage?

Fertilizer type: Balanced

Salvia japonica requires a moderate amount of fertilizer to maintain its vibrant growth and flowering. Typically, apply a balanced liquid fertilizer suitable for blooming plants at half the recommended strength to avoid over-fertilization. For slow-release granules, follow the product's instructions, aiming for approximately 5 grams per square meter, lightly mixed into the soil.

How to Prune East asian sage?

Pruning Time: Spring, Summer

Use sharp, clean pruning shears to ensure precise cuts and prevent the spread of disease. Dull tools can damage the plant and create uneven cuts that affect its health. Start by removing any dead or damaged stems to clear the way for new growth. Trim back overgrown shoots to maintain the plant's shape and encourage fuller foliage. When pruning, make cuts just above a pair of leaves or leaf node. This encourages the plant to produce new growth in a desired direction, resulting in a bushier appearance. After focusing on health, turn your attention to aesthetics. Shape the plant by trimming to form a pleasing outline, ensuring balance so all sides receive ample light. More About Pruning Techniques→

How to Propagate East asian sage plant?

Propagate Time: Spring, Early Spring, Late Spring

Harvest mature seeds from Salvia japonica in late autumn. Ensure seeds are completely dry before storing them in a cool, dry place until planting in early spring. This step is crucial for preserving seed viability.

Use sterilized pruning shears to take 4-6 inch cuttings from healthy, non-flowering stems during early spring. Remove the lower leaves and dip the cut end in rooting hormone before planting in a potting mix.

In late spring, divide established Salvia japonica plants. Carefully dig up the plant and use a sharp knife to separate the root ball into smaller sections. Each section should have roots and shoots for successful propagation.

More About Propagating Techniques→

How to Repot East asian sage plant?

Repotting frequency: Every 2-3 years

You should consider repotting Salvia japonica when you observe that it is becoming root-bound, meaning roots start growing out of the drainage holes or circling inside the pot. Additionally, if the plant is exhibiting stunted growth or has been in the same pot for more than three years, it's time to repot. The ideal seasons are Spring or Summer, as the plant is actively growing and can recover more quickly.

Select a pot that is one size larger than the current one, ensuring it has adequate drainage holes. A terracotta or clay pot is an excellent choice as it helps wick away excess moisture, preventing root rot. The size increase allows space for root expansion without overwhelming the plant, promoting healthy growth and development.

Opt for a well-draining potting mix that mimics the plant's natural habitat. A blend that includes peat, perlite, and a bit of coarse sand encourages optimum drainage while retaining enough moisture. This type of soil ensures the roots do not stay waterlogged, reducing the risk of root diseases and promoting vigorous growth.