Salix exigua — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Salix exigua

Salix Exigua

Updated · 218 observations
ON THIS PLANT

Salix exigua, commonly known as narrowleaf willow or coyote willow, is a deciduous shrub or small tree native to North America. It typically reaches up to 20 feet in height and features narrow leaves that are about 2-4 inches long and less than half an inch wide. The leaves are green on top and pale underneath, with finely serrated edges.

In the spring, before the leaves emerge, the plant produces small yellowish-green flowers. These flowers are followed by small capsules containing numerous tiny seeds, which are dispersed by the wind.

Salix exigua thrives in moist soils and is commonly found growing along streams, rivers, wetlands, and other areas with high water tables. It is often used for erosion control due to its extensive root system, which helps stabilize soil along waterways.

The plant serves various purposes; it is a food source for wildlife such as beavers, deer, rabbits, and birds and provides habitat for many insect species, including butterflies. Additionally, it has traditional medicinal uses due to its anti-inflammatory properties.

Overall, Salix exigua is an important plant species in North America, valued for its ecological significance and cultural uses.

A note from PlantMom

Narrowleaf willow is disease-resistant and generally not easily affected by illnesses. With regard to care, this plant is fairly low-maintenance. When grown outdoors it needs only limited watering, and larger specimens typically do not require pruning; however, smaller plants should be trimmed after they finish blooming. Narrowleaf willowt is appropriate for anyone who has outdoor space, like a garden or deck, and does not demand extensive care experience.

— PlantMom
CARE GUIDE

How to keep Salix Exigua.

Light

Narrowleaf willow grows best in full sun, though it can tolerate locations with partial sunlight. Its native occurrence in sunny habitats contributes to its good health and growth. Too much or too little sunlight may cause the plant's health to deteriorate.

Water

The narrowleaf willow thrives in moderate conditions, preferring soil that is evenly moist. To maintain this balance, water the plant every 1-2 weeks, ensuring the soil remains moist but not waterlogged. While it is typically grown outdoors, this plant adapts well to different moisture levels in its natural habitat. It also conserves water by shedding its leaves when it goes dormant.

Temperature

Narrowleaf willow grows best in a temperature range of 41 to 95 ℉ (5 to 35 ℃). It is native to temperate regions where temperatures can drop to about 23 ℉ (-5 ℃) in winter and rise to around 86 ℉ (30 ℃) in summer. To cope with these yearly temperature variations, Narrowleaf willow needs regular watering and well-drained soil.

Fertilizer

Fertilize your Narrowleaf willow in early spring to encourage healthy growth. Regular feeding improves overall health, leading to vigorous growth, greater resilience to harsh conditions, and better resistance to pests and diseases. Keep to a specific fertilization schedule for your Narrowleaf willow to maintain lush foliage with deep, vibrant color.

Pruning

To promote the healthy growth of narrowleaf willow, it is beneficial to prune it in early spring. Focus on removing dead wood and thinning branches to improve airflow. This timing coincides with the plant's dormant phase, which supports vigorous growth. Regular pruning helps maintain the willow's shape and health while preventing overgrowth and disease. For more detailed guidance, consult horticultural sources.

Pot & Repot

When repotting Narrowleaf willow, choose a pot 1-2 inches (2.5–5.1 cm) larger with ample drainage. Use a well-draining, potting mix. Repot in spring or fall, ensuring the root ball sits slightly below the rim of the flower pot. Water thoroughly after repotting and place in a warm spot with indirect sunlight.

CHARACTERISTICS

Botanical profile.

Plant Type
Shrub
Life Cycle
Perennial
Genus
Salix
Family
Salicaceae
Hardiness Zone
4-9
Mature Height
3.66 m to 10.97 m
Mature Spread
6.1 m
Leaf Color
Green, Gray, Silver
Leaf Type
Deciduous
Flower Color
Yellow
Flower Size
2.54 cm
Bloom Time
Mid spring, Late spring, Early summer
Planting Time
Spring
Harvest Time
Early summer, Mid summer
Native Area
Mexico
ALSO KNOWN AS

Other names.

en Sandbar willow en Coyote willow en Narrow-leaf willow en Narrowleaf willow en Desert Willow en Narrow-leaved Willow en Western Sandbar Willow
FREQUENTLY ASKED

Reader questions.

How can I water my Narrowleaf willow plant in the best way?

To promote excellent root development, it is recommended to place a garden hose at the base of the plant. It is important to avoid directly spraying the leaves. If the leaves are exposed to direct sunlight outdoors, they will need more water. Bubblers can be used to moisten the roots of each plant. Soaker hoses can be used to cover the entire garden or bed, especially when adding or removing plants, to ensure deep root watering. After watering, any excess water should be drained and the soil should be allowed to dry before watering again. To prevent diseases, it is advised to water at ground level. On a sunny day, it may be beneficial to spray the entire bush with water. Regardless of whether the plant is in a pot or in the ground, it's important to remember that Narrowleaf willow prefers deep watering rather than light sprinkling.

Why should I put fertilizer on my Narrowleaf willow?

To ensure the good health of your Narrowleaf willow, it is important to provide regular fertilization. This will supply the necessary nutrients for strong growth, resilience to tough conditions, and the ability to fight off diseases and pests. The foliage of your Narrowleaf willow is particularly attractive, so it is essential to maintain it. To achieve this, establish and stick to a fertilization schedule tailored to your specific Narrowleaf willow. This will result in vibrant leaves with deep color and a lush appearance.

What are the sunlight requirements for plants?

Plants generally require specific amounts of sunlight to thrive, categorized into full sun and partial sun. Full sun means the plant needs more than 6 hours of direct sunlight daily, while partial sun refers to about 3-6 hours of sunlight. It's essential to observe how sunlight moves through your garden, choosing locations that offer a balance of light and shade tailored to your plants' needs, ensuring they remain healthy and vibrant.

What temperature range is optimal for the growth of Narrowleaf willow?

Narrowleaf willow thrives in a temperature range of 41 to 95°F (5 to 35°C) for optimal growth. It is well-suited to temperate climates, where winter temperatures can drop as low as 23°F (-5°C) and summer temperatures can reach up to 86°F (30°C). To cope with these variations throughout the year, regular watering and proper soil drainage are essential to maintain the health of the plant. Despite its strong cold resistance, in extreme conditions where winter temperatures are expected to fall below -30°C, steps should be taken to protect the plant against frost by wrapping its trunk and branches with protective materials like non-woven fabric or cloth. Additionally, watering the plant abundantly before the first freeze in autumn helps ensure the soil stays moist into the freeze, which prevents drought and water scarcity during the winter and early spring.

What do I need to do if I give Narrowleaf willow too much or too little water?

An overwatered Narrowleaf willow can show signs of yellowing, wilting, and dropping leaves. The stems may become mushy and the plant overall will look unhealthy. If you notice these signs, it's best to adjust your watering schedule. On the other hand, wilting can also be a sign of under watering. Underwatered leaves will turn crispy and dry, while overwatered leaves will appear soft and wilted. Check the soil for dryness and if watering alone is not enough, give it a thorough watering. However, even with enough water, the Narrowleaf willow may still have dry and yellow leaves due to a damaged root system. Once the plant returns to normal, the yellowing of leaves will stop. When growing the Narrowleaf willow indoors, always check the moisture levels in the pot. Avoid overwatering and look for signs of black spots. If present, allow the soil to dry by withholding water for a few days. Overwatering can lead to root rot, so if you notice discolored and slimy roots, consider transferring the plant to a different pot. Preventing root rot by avoiding overly soggy soil is important. When planting the Narrowleaf willow outdoors, make sure to dig a little deeper. If the soil feels too dry when checked with your fingers, it may indicate underwatering. Adequate watering is necessary for the plant to recover.

When should I fertilize my Narrowleaf willow?

To ensure healthy growth, it is recommended to fertilize your Narrowleaf willow for the first time in late winter or early spring. This provides the necessary nutrients for the plant to thrive when the weather gets warmer. If you live in a warm climate region, it is beneficial to provide an additional fertilizer feeding in early fall. This not only adds nutrients for the following growing season but also helps the plant withstand winter cold without foliage damage. Fertilizing earlier in the season promotes the growth of sturdy branches that can withstand the cold winter.

How does sunlight affect the growth and health of a Narrowleaf willow?

The Narrowleaf willow thrives best with complete exposure to the sun but can also adapt to moderately sunny locations. Originating from sunny habitats, this plant needs ample sunlight for optimal health and growth. However, too much or too little sunlight can harm the plant's health. During periods of insufficient natural sunlight, such as winter or in less sunny spaces, artificial lighting can be a crucial solution. It's suggested to use LED lights, which can mimic natural solar conditions, ensuring plants receive 8-12 hours of light day at appropriate intensities, depending on their sunlight requirements.

How does Narrowleaf willow react to low temperatures, and what are the solutions?

Narrowleaf willow is cold-tolerant and generally does well in temperatures above 5°C. In winters, it is recommended to keep it above -25°C. If the temperature drops below -30°C, the plant may not show immediate damage during winter, but in spring, its branches might become brittle and dry, with no new shoots emerging. The ideal solution for this is to prune away any dead branches that have failed to produce new leaves in the spring, which helps the plant to recover and grow new shoots.

How frequently should I give water to my Narrowleaf willow?

The Narrowleaf willow prefers deep and infrequent watering, especially when planted in pots. The limited water storage of flower pots causes the soil to dry out quickly, so soaking them in a gallon of water each time is necessary. In cold regions, watering is needed every 3 to 5 days. It is best to water in the early morning when the soil is dry, both indoors and outdoors. To determine if watering is necessary, check the soil by feeling the top 2-3 inches. If it is dry, it's time for a full watering. On hot days, check the moisture daily as the soil can dry out rapidly in the pot. If you have a garden, irrigation is required as well. In hot climates, watering once a week is ideal. Check the soil and water when about 2-3 inches become too dry, but consider the amount of rainfall to prevent root rot. During the growth seasons (spring and fall), add mulch around 3-4 inches deep to conserve water when the plants are outdoors. Sandy soil drains faster, so watering should be more frequent. On the other hand, clay soil requires less frequent watering, with a gap of 2-3 days to allow the plant to dry and prevent root rot. Keep track of watering dates and pay attention if the leaves start to droop, as this may indicate the need for watering.

When is not a good time to add fertilizer to my Narrowleaf willow?

There are several times throughout the year when you should avoid fertilizing your Narrowleaf willow. The first time is during the early and mid-winter months when the plant is dormant and doesn't need any nutrients. Additionally, it's not recommended to fertilize the plant during late spring and summer, when the weather tends to be hotter and drier. Fertilizing during this time can have a negative impact on the Narrowleaf willow. To prevent any problems, it's best to stick to a fertilization schedule that only involves feeding the plant in early spring and early fall.

What are some common symptoms of insufficient sunlight in Narrowleaf willow?

When the Narrowleaf willow does not receive enough sunlight, it can exhibit several symptoms indicating stress or poor health. These include smaller new leaves, leggy growth with longer spaces between leaves or stems, premature leaf drop, halted new growth, paler new leaves, and chlorosis or yellowing of leaves. Additionally, excessive sunlight can cause symptoms like sunscald, leaf curling, wilting, leaf scorching, and overall reduced plant health. Recognizing these signs early can help in implementing corrective measures to mitigate damage.

How does Narrowleaf willow react to high temperatures, and what are the recommended solutions?

During the summer, it's crucial to ensure that the Narrowleaf willow's temperature stays below 35°C. Should the temperature exceed 38°C, the plant's leaves might lighten in color, and their tips may become dry and withered, leading to an increased risk of sunburn. To address these issues, trim away the sunburned and dried-up parts of the plant. Moving the plant to a shaded location or employing a shade cloth to protect it during the peak midday and afternoon sun can be beneficial. Additionally, watering the plant in the morning and evening helps keep the soil moist, assisting in the plant's recovery and continued health.

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

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