Blue lupine (Lupinus pilosus)

Also known as: Blue Lupine, Annual Lupine

Lupinus pilosus, commonly known as blue lupine, features striking deep blue flowers with dark veins and grows on hairy red stems. Ancient Europeans named it lupine, derived from "lupus" (wolf), due to the belief that it sapped nutrients from the soil. Not only is it visually appealing, but it also has a scent similar to grape soda.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Blue lupine

Lifespan

Annual

Plant Type

Herb

Plant Height

30 cm to 70 cm

Spread

30 cm

Leaf Color

Silvery-green

Flower Size

1 to 2 centimeters

Flower Color

Purple Blue

Images of Blue lupine

Quickly Identify Blue lupine

Look for its characteristic blue flowers and silvery-haired leaves. The plant often grows in clusters and has a distinctive legume-like pod.

Scientific Classification of Blue lupine

Phylum

Vascular plants

Class

Dicotyledons

Order

Fabales

Family

Legume

Genus

Lupines

Species

Blue lupine

Planting and Growing of Blue lupine

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

68-77℉

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, Terracotta

How to Water Blue lupine?

Lupinus pilosus requires moderate watering. Each time you water, use approximately 500 milliliters. Ensure the soil is moistened uniformly but not drenched to the point of saturation. This ensures the roots receive adequate moisture without being waterlogged.

What are the symptoms of an underwatered Blue lupine? ›

What should I do if my Blue lupine is not getting enough water? ›

What are the symptoms of an overwatered Blue lupine? ›

How to save an overwatered Blue lupine? ›

What Are the Sunlight Requirements for Blue lupine?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Lupinus pilosus benefits from full to partial sun, enabling robust growth and colorful blooms. The ideal light ensures the plant flourishes, demonstrating healthy development and vibrant flowers.

What is the Best Lighting Condition? ›

How to Achieve the Ideal Lighting? ›

Benefits of Ideal Lighting ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Blue lupine?

Ideal Temperature: 68 ~ 77℉

Lupinus pilosus thrives best in temperatures ranging from 68°F to 77°F. This range ensures optimal growth and supports the plant's metabolic processes, leading to healthy foliage and flowering.

What Soil is Best for Blue lupine?

Soil type: Loam, Sandy loam, Sand soil

Soil PH: 6.5 ~ 7.5

Lupinus pilosus thrives in nutrient-rich soil, which supports healthy plant growth and prolific blooming. Ensuring the soil is well-fertilized provides essential minerals necessary for the plant's development. Good drainage is crucial for Lupinus pilosus to prevent root rot and other moisture-related issues. Ensuring the soil allows excess water to escape helps maintain appropriate moisture levels for optimal health. While well-draining, the soil should retain enough moisture to support steady growth. Adequate moisture keeps the plants hydrated without oversaturation, crucial for maintaining turgidity in stems and leaves.

How to Fertilize Blue lupine?

Fertilizer type: Balanced

Lupinus pilosus, also known as blue lupine, requires moderate fertilization. For liquid fertilizers, follow the manufacturer's instructions and apply approximately half-strength of the recommended rate to avoid over-fertilization. When using slow-release fertilizers, 10-15 grams per application is generally sufficient for mature plants.

How to Prune Blue lupine?

Pruning Time: Spring, Summer

Shaping the plant not only makes it more aesthetically pleasing but also increases airflow, reducing the risk of fungal diseases. Aim to open the center of the plant by removing crossing or inward-facing branches. This boosts light penetration and air circulation, which are crucial for healthy growth. To encourage Lupinus pilosus to grow more bushy and full, trim back the tips of the plant. This can stimulate the growth of lateral buds, resulting in a denser foliage. Be mindful of where you cut; aim just above a node to promote branching in the desired direction. More About Pruning Techniques→

How to Propagate Blue lupine plant?

Propagate Time: Late spring, Early summer

Start by soaking the seeds in lukewarm water for 24 hours to soften the seed coat. This step increases water absorption, aiding in quicker germination.

Plant the prepared seeds in a mix of sand and peat moss or a similar light, well-draining soil. Sow them about 1/4 inch deep and cover lightly with soil.

Select a healthy stem for cuttings, about 4-6 inches long. Cut just below a node and remove the lower leaves. Dip the cut end in rooting hormone for better root development.

More About Propagating Techniques→

How to Repot Blue lupine plant?

Repotting frequency: Every 1-2 years

Repotting Lupinus pilosus is advisable when you notice roots growing through drainage holes, or when the plant’s growth seems stunted, indicating root bound conditions. The best time to repot is during its dormant season in either early spring or autumn, which minimizes growth disturbances.

When selecting a pot, ensure it's slightly bigger than the current one to accommodate more root growth. A pot with adequate drainage holes is crucial, as standing water can lead to root rot. The new pot should ideally be about 1-2 inches larger in diameter to provide space for lateral root expansion while not overwhelming the root system.

Opt for a well-draining, sandy loam soil mix to prevent any waterlogging. Such a mix ensures that the plant’s roots have adequate access to nutrients while preventing excess water retention which could foster fungal diseases.