Mt. diablo milkvetch (Astragalus oxyphysus)

Also known as: Diablo milkvetch, Crescent milkvetch

The Mt. Diablo milkvetch (Astragalus tener var. tener) is an annual herb notable for its low, sprawling growth and delicate pink to purple pea-like flowers. It is adapted to grassland and coastal scrub habitats, often flourishing in clay-rich soils.

**Characteristics:**
1. **Growth Form:** Low-growing, sprawling annual herb.
2. **Flowers:** Small, pink to purple pea-like blossoms that bloom in spring.
3. **Leaves:** Pinnately compound leaves with several small leaflets.
4. **Habitat:** Found in grasslands and coastal scrub, particularly in areas with clay soils.

**Ecological Benefits:**
1. **Soil Fertility:** Enhances soil health through nitrogen fixation, converting atmospheric nitrogen into forms usable by other plants.
2. **Biodiversity Support:** Attracts and provides nourishment for various pollinators, including bees.
3. **Erosion Prevention:** Stabilizes the soil with its root systems, helping to prevent erosion.
4. **Habitat Indicator:** Serves as an indicator of undisturbed, healthy ecosystems, reflecting specific soil and climatic conditions.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Mt. diablo milkvetch

Lifespan

Perennial

Plant Type

Herb

Plant Height

30-60 centimeters

Spread

N/A

Leaf Color

Green

Flower Size

1-2 centimeters

Flower Color

Cream

Images of Mt. diablo milkvetch

Quickly Identify Mt. diablo milkvetch

Astragalus oxyphysus can be identified by its pinnate leaves, typically with 11-23 leaflets. The plant has a dense inflorescence of cream-colored flowers and produces curved, crescent-shaped pods.

Scientific Classification of Mt. diablo milkvetch

Phylum

Vascular plants

Class

Dicotyledons

Order

Fabales

Family

Legume

Genus

Milkvetch

Species

Mt. diablo milkvetch

Planting and Growing of Mt. diablo milkvetch

Care Difficulty

Moderate

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

4-6 hours

Ideal Temperature

65-77℉

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 Mt. diablo milkvetch?

When watering Astragalus oxyphysus, it's important to follow the principle of thorough saturation, ensuring the roots receive ample moisture without letting excess water sit in the soil. Aim for around 500 ml of water per session, allowing the soil to get completely wet, but not waterlogged. The water should be enough to moisten the entire root zone.

What are the symptoms of an underwatered Mt. diablo milkvetch? ›

What should I do if my Mt. diablo milkvetch is not getting enough water? ›

What are the symptoms of an overwatered Mt. diablo milkvetch? ›

How to save an overwatered Mt. diablo milkvetch? ›

What Are the Sunlight Requirements for Mt. diablo milkvetch?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours daily

Astragalus oxyphysus prefers full sun to partial sun conditions. Under such light, it flourishes, showcasing vibrant growth and sturdy structure. This range ensures efficient photosynthesis and vigorous overall health.

What is the ideal lighting condition for Astragalus oxyphysus? ›

What solutions are there for achieving ideal lighting? ›

What are the benefits of providing ideal lighting? ›

What Is the Ideal Temperature Range for Mt. diablo milkvetch?

Ideal Temperature: 65 ~ 77℉

Astragalus oxyphysus thrives in a mild temperature range between 65°F and 77°F. This range promotes optimal growth and ensures the plant's vital physiological processes operate efficiently. Stability within this range helps avoid stress on the plant, facilitating robust development and flower production.

What Soil is Best for Mt. diablo milkvetch?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Astragalus oxyphysus thrives in well-draining soil, allowing roots to access oxygen and prevent waterlogging which can cause root rot. This benefit is crucial for healthy growth and flower production. The plant prefers soil with moderate organic matter. Overly rich soil isn't necessary and can even inhibit flowering, making moderate fertility ideal for optimal growth and blooms. This species tolerates a pH range of 6.5 to 7.5, thriving best near neutral conditions. This pH range supports nutrient availability, critical for plant health and development.

How to Fertilize Mt. diablo milkvetch?

Fertilizer type: Balanced

Astragalus oxyphysus benefits from a balanced approach to fertilization. Use a liquid fertilizer at half the recommended concentration on the label. For slow-release fertilizers, apply according to product instructions but err on the side of less to avoid over-fertilization. Maintain soil richness without overwhelming the plant.

How to Prune Mt. diablo milkvetch?

Pruning Time: Spring, Summer

Begin by inspecting the Astragalus oxyphysus for any dead, damaged, or diseased branches. Prune away these first to stimulate new growth and prevent any infection from spreading throughout the plant. Thin out overcrowded areas to promote airflow and light penetration throughout the plant. Carefully remove excess growth without altering the natural shape of the shrub. Every few years, consider cutting back a third of the older, woodier branches. This allows younger, more vigorous shoots to take over, ensuring the plant remains productive and lush. More About Pruning Techniques→

How to Propagate Mt. diablo milkvetch plant?

Propagate Time: Spring

To begin propagation, collect healthy seeds from mature Astragalus oxyphysus plants. Clean the seeds to remove any debris and store them in a cool, dry place until planting.

Sow the seeds in trays filled with potting mix, spacing them at least 1 inch apart. Cover the seeds lightly with soil and water them gently to keep the mix moist.

Place the seed trays in a warm area with indirect sunlight. Once the seedlings have developed two sets of true leaves, carefully transplant them to individual pots.

How to Repot Mt. diablo milkvetch plant?

Repotting frequency: Every 2-3 years

You will know it's time to repot Astragalus oxyphysus when you see roots emerging from the drainage holes, or if it seems that water is not penetrating through the current soil. These are strong indicators that the plant has outgrown its current pot and is in need of more space to thrive and to absorb nutrients efficiently.

Select a pot that is about 2 inches larger in diameter than the current one to provide ample space for growth. Ensure it has drainage holes to prevent waterlogging, which can lead to root rot. Using the right-sized pot helps maintain optimal soil moisture levels and supports healthy root development.

Opt for a well-draining sandy soil mix to ensure that excess water can easily escape. This prevents waterlogging and provides a balance of moisture and aeration, promoting healthy root growth and minimizing the risk of fungal diseases.

Toxicity

Ingestion

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.

Learn More About Mt. diablo milkvetch Diseases

Anthracnose Bacterial Leaf Spot Bacterial Wilt Crown Gall Cyst Nematode Damping-off Downy Mildew Drought Stress Fusarium Wilt Gray Mold Leaf Spot Mosaic Nutrient Deficiency Nutrient Toxicity Powdery Mildew Root Rot Root-knot Nematode Rusts Sooty Mold Spider Mites Temperature Stress Thrips Damage White Mold

Learn More About Mt. diablo milkvetch

How to Prune