Small-flower lupine (Lupinus polycarpus)

Also known as: Alkali Lupine

Lupine, a robust legume, features a bushy growth pattern, with clusters of palmate leaves and tall, eye-catching spires of blue to purple flowers. These vibrant blooms are highly attractive to pollinators and typically thrive in well-drained soils, adapting well to various environments such as sunny slopes and open forests. The nitrogen-fixing roots of lupines allow them to prosper even in nutrient-deficient soils, thereby improving soil fertility.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Small-flower lupine

Lifespan

Annual

Plant Type

Herb

Plant Height

20-60 cm

Spread

Not typically described in terms of canopy.

Leaf Color

Green

Flower Size

1-2 cm

Flower Color

Blue, Purple, White

Images of Small-flower lupine

Quickly Identify Small-flower lupine

Identifiable by its deeply divided palmate leaves and dense spikes of pea-like flowers, which can be in various shades of blue, purple, or white. The plant\'s height and presence of trichomes (hairy leaves and stems) are also key identification features.

Scientific Classification of Small-flower lupine

Phylum

Vascular plants

Class

Dicotyledons

Order

Fabales

Family

Legume

Genus

Lupines

Species

Small-flower lupine

Planting and Growing of Small-flower lupine

Care Difficulty

Moderate

Watering Schedule

Every 3 days

Sunlight Requirements

Full 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

Plastic, Ceramic

How to Water Small-flower lupine?

For Lupinus polycarpus, watering should be done generously. The aim is to ensure the soil is thoroughly moist but not soggy. Water until roughly 500 milliliters have seeped into the soil, ensuring the roots have proper moisture access without drowning them.

What are the symptoms of an underwatered Small-flower lupine? ›

What should I do if my Small-flower lupine is not getting enough water? ›

What are the symptoms of an overwatered Small-flower lupine? ›

How to save an overwatered Small-flower lupine? ›

What Are the Sunlight Requirements for Small-flower lupine?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours per day

Lupinus polycarpus thrives in environments offering full to partial sun, primarily beneficial between 6 to 8 hours daily. Optimal sunlight fosters healthy blooms and prevents disease, maintaining plant structure and aesthetics.

Solution to Achieve Ideal Lighting ›

Specific Actions to Ensure Optimal Light ›

Benefits of Ideal Lighting ›

What Is the Ideal Temperature Range for Small-flower lupine?

Ideal Temperature: 60 ~ 75℉

Lupinus polycarpus thrives best in temperatures between 60°F and 75°F. This range promotes optimal metabolic activities and photosynthesis, allowing for healthy growth and flowering. Maintaining this temperature ensures that the plant develops properly and efficiently.

What Soil is Best for Small-flower lupine?

Soil type: Sandy soil, Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Lupinus polycarpus thrives in nutrient-rich soils that can supply adequate nitrogen, essential for its growth and vibrant blooms. The richness of the soil ensures a healthy lifecycle and improves flowering success. This plant requires well-draining soil to prevent root rot. Quick drainage is crucial to keep the roots healthy and ensure the plant doesn't succumb to excess moisture, which could lead to fungal infections. A soil pH between 6.5 and 7.5 is ideal for Lupinus polycarpus, allowing optimal nutrient absorption. Balanced pH ensures that the plant can access all necessary minerals for sustained growth and vitality.

How to Fertilize Small-flower lupine?

Fertilizer type: Balanced

Lupinus polycarpus, a plant known for its vibrant flowers, requires careful fertilization. Use 1/4 to 1/2 teaspoon of liquid fertilizer per gallon of water for a young plant. For solid fertilizer, apply a balanced fertilizer like 10-10-10 sparingly, as too much can harm the roots. Always ensure a thorough watering after fertilization to prevent root burn.

How to Prune Small-flower lupine?

Pruning Time: Spring, Summer

First, identify any dead or brown stems. These should be the first to go, as they won't contribute to your plant's energy but will hinder airflow and growth. After removing dead parts, trim to maintain a balanced shape. Focus on ensuring light reaches all areas of the plant by thinning out overcrowded sections. More About Pruning Techniques→

How to Propagate Small-flower lupine plant?

Propagate Time: Spring, Early summer

Start the process by filling your seed tray with free-draining compost. Ensure the soil is moist but not waterlogged, as excessive moisture can lead to rot. Sow the seeds lightly over the surface and cover them with a thin layer of compost.

Select healthy, non-flowering stems from the parent plant. Use pruning shears to cut a 4-6 inch section just below a node. Remove the lower leaves to leave a bare stem at least half of the cutting's length.

Dip the cut end of each cutting into a rooting hormone powder to encourage root formation. Plant each cutting deep enough into a pot of moist, well-draining soil that it stands upright. Provide humidity by covering the pots with a plastic bag or propagator lid.

How to Repot Small-flower lupine plant?

Repotting frequency: Once every 1-2 years

Lupinus polycarpus should be repotted when you notice that its growth has slowed down, the roots are growing through the pot's drainage holes, or the soil dries out very quickly. Early spring is ideal, allowing the plant to establish itself before blooming begins.

Opt for a pot that is one size larger and has good drainage holes. A slightly larger pot encourages healthy root growth without overwhelming the plant, which is crucial for avoiding water-logging and root rot.

Choose a sandy, nutrient-rich soil mix. A blend suited for Lupinus polycarpus usually contains components like sand for drainage, accompanied by compost or peat moss for nutrients. This mix supports root health and adequate moisture absorption without water retention issues.

Toxicity

Ingestion of seeds or plant parts

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 Small-flower lupine 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 Small-flower lupine

How to Prune