Calamagrostis canescens — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Calamagrostis canescens

Calamagrostis Canescens

Updated · 104 observations
ON THIS PLANT

Calamagrostis canescens, known as purple small-reed, is a species of grass in the family Poaceae, native to Europe and western Siberia.

A note from PlantMom

Purple small-reed is resistant to disease and is usually not prone to illnesses. As for care, the plant is fairly low-maintenance. When grown outdoors it needs little watering, and larger plants typically do not require pruning. Smaller plants, however, should be pruned after they have finished blooming. Purple small-reedt is suitable for anyone with an outdoor area, such as a garden or deck, and does not demand much gardening experience.

— PlantMom
CARE GUIDE

How to keep Calamagrostis Canescens.

Light

The purple small-reed requires ample light all day to attain optimal growth and health. Provided harsh sunlight is avoided, it still prospers in areas with partial light. Both too much and too little light can undermine its wellbeing. It was originally cultivated in a setting rich in sunlight.

Water

Purple small-reed thrives in moist environments and needs consistent hydration. For optimal health, water it weekly. Although it can tolerate moderate drought, it flourishes during the growing season with rainwater, which supports its natural water cycle and enhances its vigor.

Temperature

Purple small-reed can tolerate a broad range of temperatures, but its distribution can still be constrained by different combinations of water and heat. It performs best in warm summer climates with sufficient rainfall or watering. Extended periods of cloudy, rainy weather or prolonged high temperatures can raise the chance of Purple small-reed dying. In winter, adequate protection from the cold can increase the plant's survival rate.

Fertilizer

Purple small-reed needs extra nutrients to encourage healthy new growth. In spring, spreading some compost around the plant’s base can effectively supply the nutrition it requires. Fertilizing supports vigorous growth and helps the plant resist diseases and pests.

Pruning

Purple small-reed is characterized by its tall, slender stalks and feathery plumes. To keep the plant healthy and prevent it from becoming invasive, it's best to prune it in early spring. Cut the plant back to a few inches above the ground, removing any dead stems. This process improves air circulation, promotes plant health, enhances flowering, and encourages vigorous new growth. Regular pruning helps maintain the plant's vitality.

CHARACTERISTICS

Botanical profile.

Plant Type
Grass
Life Cycle
Perennial
Genus
Calamagrostis
Family
Poaceae
Hardiness Zone
4-9
Mature Height
1.22 m
Mature Spread
30 cm to 61 cm
Leaf Color
Green, Light Green
Leaf Type
Semi-evergreen
Flower Color
Yellow, Purple, Brown
Flower Size
1.52 cm to 6.35 cm
Bloom Time
Early summer, Mid summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Late summer, Early fall
ALSO KNOWN AS

Other names.

en Purple Small-reed en Purple smallreed en Purple-flowered smallreed en Reed Bent
FREQUENTLY ASKED

Reader questions.

What should I do if I give too much or too little water to my small purple reed?

Proper watering is crucial for the health of this beautiful ornamental grass. When planted in the ground, any watering issues can typically be resolved. However, if it's in a container, too much or too little water can quickly kill the Purple small-reed. Insufficient water can cause it to stop growing, while overwatering can result in yellow leaves with brown tips. Signs of underwatering include drooping leaves, weak seed head production, and browned leaves. If you suspect your Purple small-reed has been improperly watered, the first step is to determine if it's receiving too much or too little water. If it's getting too much, stop watering immediately, keeping in mind that heavy soils may take weeks to dry out. Once you see new growth, test the soil for moisture and decide if it needs more water. On the other hand, if it's getting too little water, simply give it a deep drink and see if it perks up. It's worth remembering that a long, deep watering is always better than frequent shallow waterings. This encourages the grass to develop deep roots, making it more resistant to drought and watering-related issues.

What are the sunlight requirements for Purple small-reed?

Purple small-reed thrives in environments that offer extensive illumination throughout the day for optimal growth and health. It requires full sun, which is above 6 hours of sunlight daily, and can also grow in partial sun, about 3-6 hours of sunlight. Despite its need for ample light, it can still flourish with some shade, avoiding only the harsh direct light. It's essential to observe the movement of sunlight in your garden to choose spots that provide the right balance of light and shade, ensuring the plant's happiness.

How often do I need to water my Purple small-reed plant?

The watering needs of Purple small-reed vary depending on its planting location. In general, watering this grass once a week is recommended. However, in hot climates, it may require watering once or twice a week during the summer. For moderate climates, watering once every seven days or more may suffice. Grass in containers typically needs more frequent watering compared to those planted in the ground. Additionally, the location, whether in full sun or part shade, also affects watering requirements. Shaded grasses need less frequent watering than grasses planted in the ground. Purple small-reed should only be watered when the soil is dry. To determine if the soil is dry, press your finger a couple of inches into the soil. For potted grass, you can check its weight or feel the pot to determine if it is light from lack of water. Insufficient water may cause the blades to appear folded along their centers and thinner than usual. Despite its ability to tolerate drought, regular deep waterings will result in beautiful color. In the wild, Purple small-reed grows in open scrubland where it faces extreme heat, bright sun, and intermittent rain. Although drought resistant, this grass still requires care and attention. Gardeners agree that consistent watering is best for its thriving. When newly planted, Purple small-reed needs more frequent watering until it establishes deep roots. Potted Purple small-reed, especially in hot and direct sun, tends to dry out quickly. Test the soil every 3 to 4 days and water only when it feels dry. When planted in the ground, Purple small-reed generally needs less watering, but this depends on the soil type. Heavy clay soil retains moisture below the surface, so it may feel dry on top while still holding moisture. On the other hand, sandy soils that drain quickly will require more frequent watering.

How can artificial lighting be used for Purple small-reed and what are the guidelines?

When natural sunlight is insufficient, artificial lighting becomes a vital solution for the growth of Purple small-reed, especially indoors. LED lights are recommended because they can be customized to provide the specific wavelengths of light needed by your plants. For full sun plants like Purple small-reed, 30-50W/sq ft of artificial light is needed; partial sun plants require 20-30W/sq ft, and full shade plants 10-20W/sq ft. The artificial light source should be placed 12-36 inches above the plant to mimic natural sunlight and should be kept on for 8-12 hours per day to mimic the length of natural daylight hours appropriate for the plant species.

What things should I watch out for when I water my Purple small-reed in different seasons, climates, or during different growing?

You can determine if you are watering enough by observing the growth rate of your grass. Purple small-reed, for example, tends to grow rapidly, particularly during the hottest months of the year, often doubling in size within a year. If the weather is hot but the grass is not growing well, it may be necessary to adjust your watering schedule. In winter, watering once a month may be sufficient, but it is still important to check the moisture level of the soil. During the warmest months, the grass will require more water due to its growth cycle, whereas during winter and cooler months, the water needs will be significantly reduced. Keep in mind that it is essential to let the soil dry out completely before adding water to Purple small-reed.

What are the symptoms of inadequate lighting for Purple small-reed?

Symptoms of light deficiency in Purple small-reed may include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or halted growth, and lighter-colored or irregular new leaves. Additionally, excessive sunlight can cause problems such as chlorosis (leaves turning yellow due to a breakdown of chlorophyll), sunscald (damage from intense sunlight), leaf curling (a defense mechanism to minimize water loss), wilting (loss of turgor pressure causing droopiness), and leaf scorching (brown, dry, and crispy leaf edges). These symptoms indicate that the plant is not receiving an optimal amount of sunlight, affecting its health and growth.

What are the solutions for addressing inadequate lighting for Purple small-reed?

To address inadequate lighting for Purple small-reed, gradually move the plants to a sunnier location, ensuring they receive at least 6 hours of direct sunlight daily. For indoor plants, consider using a south-facing window, keeping curtains open during the day, or using artificial light sources like desk lamps or professional plant grow lights for at least 8 hours a day. For outdoor plants, it's crucial to move them gradually to avoid sunburn. Reducing obstructions like pruning trees can also help, as well as relocating smaller plants to sunny spots with good drainage during their dormant periods. Note that parts of the plant affected by insufficient light may not recover, but new growth will be healthy with improved light conditions.

PLATES
Calamagrostis canescens leaf
PLATE 01 · leaf
Calamagrostis canescens leaf
PLATE 02 · leaf
Calamagrostis canescens flower
PLATE 03 · flower
Calamagrostis canescens flower
PLATE 04 · flower
Calamagrostis canescens fruit
PLATE 05 · fruit
Calamagrostis canescens fruit
PLATE 06 · fruit
ALSO IN THE LIBRARY

You might also like.