Hosackia gracilis — a medium houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Hosackia gracilis

Hosackia Gracilis

Updated · 14 observations
ON THIS PLANT

Hosackia gracilis, synonym Lotus formosissimus, is a species of legume native to western North America from British Columbia through Washington and Oregon to California. It was first described by George Bentham. It is known by the common names harlequin lotus and seaside bird's-foot trefoil. It grows in moist spots in the coastal mountains and down to the oceanside bluffs. It is a perennial herb growing upright or spreading to about 0.5 m in maximum length. It is lined with leaves each made up of a few oppositely arranged oval leaflets up to 2 cm long. The inflorescence is made up of several pealike flowers each 1 to 2 cm long. The flower has a bright yellow banner, or upper petal, and bright pink or white lower petals. The fruit is a legume pod 2 to 3 cm long. It is believed that the caterpillars of the critically endangered lotis blue butterfly (syn. Lycaeides idas lotis, Lycaeides argyrognomon lotis, Plebejus anna lotis) feed on Hosackia gracilis on the Mendocino coast in damp coastal prairies.

A note from PlantMom

Harlequin lotus is relatively disease-resistant and generally not vulnerable to illnesses. However, it can still be affected by pests and diseases present in its environment, though such outbreaks are typically minor. In terms of care, this plant needs moderate maintenance. It should be pruned regularly to maintain a neat appearance and healthy growth. Fertilizing can also help encourage flowering. Harlequin lotus is suitable for anyone with outdoor space, such as a garden or patio, and does not demand extensive gardening experience. It may need more attention when grown indoors.

— PlantMom
CARE GUIDE

How to keep Hosackia Gracilis.

Light

Harlequin lotus grows best in full sun for most of the day, though it can tolerate sites with partial or occasional sun. It comes from environments with abundant sunlight. Too little light can stunt its growth, while too much may damage the foliage.

Water

The Harlequin lotus flourishes in environments that remain consistently moist. It needs to be watered weekly, but care should be taken to avoid waterlogging. While it does have a moderate tolerance for drought, it is best suited for temperate climates where rainfall naturally aligns with its growth cycles. This helps maintain a balance between hydration and growth.

Temperature

Harlequin lotus originates from areas with moderate temperatures, ideally ranging from 59 to 89.6 °F (15 to 32 °C). Seasonal temperature variations should be taken into account, imitating its native climate for optimal growth. Do not expose it to harsh, cold conditions.

Fertilizer

The primary time to fertilize Harlequin lotus is in early spring when the flowers are developing. The appropriate fertilizer promotes stronger blooms and helps Harlequin lotus produce attractive flowers. Fertilizing in early spring supports excellent flowering during the season and supplies energy for dormant growth phases.

Pruning

To ensure healthy growth, prune Harlequin lotus between early and late spring. Begin by removing any dead stems, then shape the plant as desired. Avoid heavy pruning after the plant has bloomed to minimize stress. Regular pruning enhances air circulation and prolongs flowering. Always use clean, sharp tools to prevent the spread of disease.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Perennial
Genus
Hosackia
Family
Fabaceae
Hardiness Zone
7
Mature Height
20 cm to 52 cm
Mature Spread
46 cm to 91 cm
Leaf Color
Green
Leaf Type
Semi-evergreen
Flower Color
White, Yellow, Pink, Purple, Red, Orange
Flower Size
1.02 cm to 2.03 cm
Bloom Time
Mid spring, Late spring, Early summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Summer
ALSO KNOWN AS

Other names.

en Harlequin Deer-Vetch en Seaside bird's-foot trefoil en Seaside bird's-foot lotus en Harlequin lotus en Seaside lotus
FREQUENTLY ASKED

Reader questions.

How should I water my Harlequin lotus plant in the most effective way?

To properly water the Harlequin lotus, it is important to use filtered water at room temperature or slightly warmer. Tap water should be avoided as it may contain harmful particles. This plant is accustomed to warm environments, so cold water can be damaging. It is recommended to refrain from overhead watering to prevent foliage complications. Instead, the filtered room temperature water should be applied directly to the soil until it is completely soaked. This method helps to moisturize the roots and facilitates nutrient absorption.

What kind of sunlight does Harlequin lotus require?

The Harlequin lotus plant needs full sun daily, with at least six hours of sunlight to stay healthy. While many perennials require six hours of sun each day, others like the Orange Daylily or Giant Coreopsis can survive on just three hours of sunlight. However, these flowering plants won't thrive as they would in sunnier conditions.

What is the best temperature for Harlequin lotus?

The temperature for Harlequin lotus depends on the time of year. There are two main seasons to consider: the growing season and the dormancy season. During the growing season, when the plant starts to sprout, the ideal temperature range is between 65-80℉ (18-27℃). If the temperature drops below 15℉ (-10℃), the plant may suffer, with browning and wilting leaves. However, if it's a short cold snap, the plant can survive with some assistance. Similarly, during warmer periods, Harlequin lotus needs protection from excessive heat. The plant's temperature range tops out at 95-105℉ (35-40℃), as any higher temperatures can damage the foliage and blooms, causing wilting, drooping, and sunburn on the leaves. Fortunately, there are several simple and quick methods to address this issue.

What should I do if I give my Harlequin lotus plant too much or too little water?

Overwatering is a common problem for Harlequin lotus plants and can lead to wilted, yellowing leaves, as well as diseases like root rot, mold, and mildew. Underwatering is less likely, but can cause brittle, brown leaves. It's important to notice and address signs of overwatering early, as some diseases may become irreversible if left untreated. Reduce watering immediately if you see early signs and consider improving drainage by replacing the soil. If underwatering is the issue, simply water more frequently until the symptoms disappear.

Can the sun harm Harlequin lotus? How can I keep Harlequin lotus safe from the sun and heat?

In warm climates, some Perennial Flowering Plants may struggle with excessive heat and suffer from sun damage. They can wilt, dry out, or even experience growth problems if they are consistently exposed to the intense afternoon sun. However, not all plants require protection from the light afternoon sun. For those that are harmed by intense afternoon exposure, it is recommended to provide them with some shade in warmer climates. Gardeners can achieve this by planting these plants in areas that do not receive direct heat during the afternoon, such as under trees or behind bushes.

The first year or baby Harlequin lotus needs a certain temperature to grow.

If you have a Harlequin lotus plant outside for the first year, it may need some extra care during the coldest months. Frost can badly damage the plant and prevent it from growing back in the spring. To protect the plant, keep it at or above 40℉(5℃). You can achieve this by bringing the plant inside for a month or two, or by using mulch or fabric barriers to shield it from frost. Additionally, it's a good idea to plant the Harlequin lotus in a shadier spot during the first year or two. Smaller and weaker plants have a harder time regulating their own temperature in the heat. Limit direct sunlight to no more than five hours per day, especially if the temperature exceeds 80℉(27℃). To control the summer heat, use shadecloth and make sure to water or mist the plant frequently.

How often do I need to water my Harlequin lotus?

If your Harlequin lotus plant is in a pot, the most accurate way to determine if it needs water is to stick your finger into the soil. If you find that the top two to three inches of soil are dry, it's time to water it. Outdoor Harlequin lotus plants in the ground can be tested using a similar method. Once the top few inches of soil have dried out, it's time to water them. Generally, during the spring and early fall, watering once a week is sufficient. However, during extremely hot weather, you may need to water twice or more per week. Nevertheless, mature and well-established Harlequin lotus plants have an impressive ability to tolerate drought.

Should I keep Harlequin lotus away from the sun?

Certain perennial plants require ample sunlight to reach their maximum bloom. However, in warmer climates, some of these plants actually benefit from less sun. For instance, individuals residing in hotter regions might find it beneficial to shade their flowering perennials during the intense afternoon sun, especially during summer months. Although many perennial flowering plants prefer partial shade in the hottest climates, there are exceptions. Take the Giant Coreopsis, for example, as it is not bothered by excessive sun exposure. These plants can flourish even when placed in the full sun during scorching weather.

How can I keep Harlequin lotus safe from really hot or cold weather?

During the growing season, if temperatures drop below 15℉(-10℃), there are a few things you can do to protect Harlequin lotus from frost or cold damage. If you have the lotus in a container, simply bring the container inside with bright, indirect light until the temperatures rise again. For ground-planted lotus, you can use mulch or horticultural fabric to create a barrier around the plant to protect it from frost and cold wind. On the other hand, if temperatures go above 80℉(27℃) in the shade, it's important to limit the lotus' exposure to sunlight to no more than six hours a day, preferably in the morning. You can use shade cloth or a fine plastic mesh to reduce direct sunlight during the hottest times of the day. Installing a misting system that releases cooling mist around the base of the plant can also help lower ground temperatures.

How much water does my Harlequin lotus need? How often should I water my Harlequin lotus?

To properly water your Harlequin lotus, don't hold back on the amount of water you give. Make sure the top two to three inches of soil are dry, then give the plant a good, deep watering. You should add enough water so that it completely saturates the soil, causing excess water to flow out of the drainage holes at the bottom of the pot. If you don't see any excess water draining out, it means you haven't watered enough. However, be careful not to let water accumulate in the soil, as this can harm the plant. On the other hand, if water is not draining properly from the pot, it may indicate that the soil doesn't drain well, which is not good for the plant's health. If the plant is outside, receiving one inch of rain per week should be enough.

What happens if the Harlequin lotus doesn't get enough sunlight?

If your Harlequin lotus plants are not receiving sufficient sunlight, you will see signs that they are not getting what they need. In general, these plants will have fewer blooms compared to those that have full sun exposure. Some plants may also develop dry spots on their leaves, although they will still manage to bloom despite the inadequate sunlight. However, these flowers will be smaller and less vibrant than those grown in full sun.

Temperature suggestions for Harlequin lotus during the inactive season.

During the cold winter months, Harlequin lotus needs a certain amount of cold to remain dormant until it's time to sprout. It's important that it doesn't sprout too early, before the last frost danger has passed, as this can be fatal, especially if it has already started growing when the frost hits. Ideally, the winter temperatures should be below 32℉(0℃), but if they reach up to 40℉(5℃), it's still fine. However, in more temperate climates like woodland rainforests, an unexpected warm spell can cause the Harlequin lotus to sprout prematurely. In such cases, if there is still a risk of frost, it can be helpful to cover it with clear plastic on stakes to protect the sprout from the cold. This cover can be removed when the frost danger has passed. Sometimes, Harlequin lotus can naturally sprout at the right time without any assistance, but using this method increases the chances of a successful second sprouting.

PLATES
Hosackia gracilis flower
PLATE 01 · flower
Hosackia gracilis flower
PLATE 02 · flower
ALSO IN THE LIBRARY

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