Tree germander (Teucrium fruticans)

Also known as: Silver germander

Tree germander (Teucrium fruticans) is a hardy evergreen shrub that reaches heights of 1.2 to 2.5 meters. Its aromatic, grey-green leaves have silvery undersides that create a striking visual effect. The plant produces lavender-blue flowers nearly year-round, attracting pollinators like bees and butterflies. Known for its durability, tree germander is drought-tolerant and resilient against wind and salt spray, making it an excellent option for coastal or seaside gardens.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Tree germander

Lifespan

Perennial

Plant Type

Shrub

Plant Height

1 m

Spread

4 m

Leaf Color

Green White

Flower Size

2.5 cm

Flower Color

Blue Purple

Images of Tree germander

Quickly Identify Tree germander

Teucrium fruticans can be identified by its silvery, aromatic leaves and small, tubular, blue to lavender flowers. The leaves are opposite, ovate to lanceolate, and covered with fine hairs that give them a silvery appearance. The flowers are borne in loose spikes and appear mainly in late spring to early summer.

Scientific Classification of Tree germander

Phylum

Vascular plants

Class

Dicotyledons

Order

Lamiales

Family

Mint

Genus

Germanders

Species

Tree germander

Planting and Growing of Tree germander

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 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 Tree germander?

When watering Teucrium fruticans, aim to provide approximately 500 ml of water each session. The key principle is to ensure that the soil is thoroughly moistened without becoming waterlogged. This means watering until you see a slight runoff from the drainage holes at the bottom of the pot, which indicates the soil is saturated but not overly wet.

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What Are the Sunlight Requirements for Tree germander?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Teucrium fruticans ideally requires full sun for 6 to 8 hours a day. Ideal lighting promotes vigorous growth, rich leaf coloration, and frequent blooming, enhancing the plant's aesthetic appeal and ecological contribution.

What is the ideal lighting for Teucrium fruticans? ›

How can I ensure ideal lighting for Teucrium fruticans? ›

What benefits does Teucrium fruticans gain from ideal lighting? ›

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What Is the Ideal Temperature Range for Tree germander?

Ideal Temperature: 60 ~ 75℉

The ideal temperature range for Teucrium fruticans, also known as Bush Germander, is between 60°F to 75°F. This temperature range ensures optimal growth and flowering. It maintains the plant's metabolism at an optimal level, thus promoting lush foliage and vibrant flowers. Staying within this bracket helps mimic the plant's native Mediterranean climate, providing conditions that support its natural growth cycle.

What Soil is Best for Tree germander?

Soil type: Sandy loam, Loam, Calcareous soil

Soil PH: 6.5 ~ 7.5

Teucrium fruticans thrives in well-drained soil to prevent waterlogging, which can cause root rot. Optimal drainage ensures the roots have access to necessary oxygen, encouraging healthy growth. While relatively low maintenance, Teucrium fruticans benefits from a nutrient-rich soil that provides essential minerals. This nurtures vibrant foliage and supports robust flowering. Teucrium fruticans prefers soil with moderate fertility, as overly fertile soil may lead to excessive leaf growth and reduced flowering. Balancing nutrients ensures a harmonious growth cycle.

How to Fertilize Tree germander?

Fertilizer type: Balanced

For Teucrium fruticans, use a balanced liquid fertilizer diluted to half the recommended strength. Apply about 100 ml per plant per session to avoid nutrient burn while promoting healthy growth.

How to Prune Tree germander?

Pruning Time: Spring, Summer, Autumn

Use clean, sharp pruning shears to trim back leggy or unruly branches. Focus on cutting just above a pair of leaves or a node to encourage denser growth. Maintain a natural dome shape for optimal aesthetic and health benefits. To enhance flowering, prune the plant after the first bloom of the season. Cutting back by one-third allows the plant to conserve energy and directs nutrients towards developing new buds, resulting in a flourishing display. More About Pruning Techniques→

How to Propagate Tree germander plant?

Propagate Time: Spring,Early spring,Late spring

Choose a healthy, non-flowering stem from the parent plant. The stem should be around 10 centimeters long. This ensures the plant can focus its energy on root development rather than supporting flowers or fruit.

Remove the leaves from the lower half of the cutting, leaving a couple of leaves at the top. This minimizes water loss through transpiration while allowing photosynthesis to continue.

Dip the cut end of the stem in rooting hormone and plant it in a pot filled with a mix of potting soil and sand or perlite for drainage. Water the cutting lightly to settle the soil around it.

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How to Repot Tree germander plant?

Repotting frequency: Every 2-3 years

Teucrium fruticans typically shows signs of needing a repot when its roots begin to circle the container it's in or grow through the drainage holes. Additionally, if the plant seems stunted or water drains too quickly through the pot, it's likely time to give it room to grow, usually occurring every 2-3 years.

Choose a pot that is about 1-2 inches larger in diameter than the current one. It should have adequate drainage holes to prevent water stagnation. Clay pots are a good choice for this plant as they allow the soil to dry out more quickly, providing the airy conditions Teucrium fruticans prefers.

Opt for a well-drained sandy soil mix. This type of soil prevents waterlogging, providing excellent drainage while retaining necessary nutrients. A mix that includes sand and perlite can help maintain the right consistency and promotes healthy root development without risking root rot.

Toxicity of Tree germander

Is Tree germander toxic to humans?

Tree germander exhibits a moderate level of toxicity in humans, and the entire plant can lead to poisoning if ingested. When individuals accidentally consume parts of tree germander, they may experience a variety of symptoms that reflect its toxic characteristics. These symptoms may include gastrointestinal issues, such as nausea, vomiting, and diarrhea, in addition to more serious reactions, including potential liver damage or neurological symptoms, which could manifest as headaches, dizziness, or confusion. The intensity of these symptoms is influenced by the quantity ingested and the individual’s sensitivity. It is crucial for individuals to recognize the potential dangers linked with tree germander and to prevent accidental ingestion, particularly in areas where this plant is found.

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.

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