Malus halliana — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Malus halliana

Malus Halliana

Updated · 21 observations
A NOTE OF INTEREST

Malus halliana is an East Asian crabapple species of Malus, known by the common name Hall crabapple. Its Chinese name is chui si hai tang(垂丝海棠). It is generally considered to be a native tree of China, although some authors maintain that it is native to Japan, and was introduced into China.

A note from PlantMom

Hall crabapple exhibits good resistance to disease and is generally not susceptible to illnesses. In terms of care, this plant is fairly low-maintenance. When planted outdoors it needs minimal watering, and larger plants typically do not require pruning. Smaller plants, however, should be pruned after they finish blooming. Hall crabapple is suitable for anyone with outdoor space, such as a garden or a deck, and does not demand extensive plant-care experience.

— PlantMom
CARE GUIDE

How to keep Malus Halliana.

Light

Hall crabapple flourishes in places with plenty of sunlight and can also cope with reduced light, making it adaptable. Excessive sun can cause wilting, while too little light may restrict its growth. Native to regions with abundant sunshine, it is adapted to bright habitats.

Water

The Hall crabapple does well with moderate moisture levels and can withstand dry periods when watered appropriately. It's best to water it once every two weeks. For outdoor Hall crabapples, it's important to take rain patterns into account during the growing season to ensure the plant receives enough water without becoming waterlogged.

Temperature

Hall crabapple thrives in a cool to moderate climate and can withstand temperatures as low as 41 ℉ (5 ℃) and as high as 95 ℉ (35 ℃). It naturally grows in areas with temperatures between 47 and 72 ℉ (8 to 22 ℃). During colder periods, it is recommended to reduce watering and protect it from frost. In hotter periods, provide shade or place it in a sheltered location.

Fertilizer

The timing of fertilizing Hall crabapple is important. Apply fertilizer in early spring and continue once a month until early summer. Fertilizer promotes attractive blooms and supplies energy during both dormant and active growth stages.

Pruning

The Hall crabapple is known for its fragrant flowers and small fruits. To maintain this tree, prune it early in the spring. Focus on removing dead wood and thinning out crowded branches to improve air circulation, but be careful not to over-prune. Regular maintenance helps improve the tree's structure, promotes healthy growth, and increases its resistance to pests. Always use clean, sharp tools to prevent damage and reduce the risk of spreading disease.

Pot & Repot

When repotting a Hall crabapple, pick a pot 1–2 inches (2.5–5.1 cm) larger that has good drainage. Use a well-draining potting mix. Repot in spring or fall, making sure the root ball sits slightly below the rim of the flower pot. Water thoroughly after repotting and place it in a warm spot with indirect sunlight.

CHARACTERISTICS

Botanical profile.

Plant Type
Tree, Shrub
Life Cycle
Perennial
Genus
Malus
Family
Rosaceae
Hardiness Zone
4-9
Mature Height
30 cm to 76 cm
Mature Spread
4.88 m
Leaf Color
Green
Leaf Type
Deciduous
Flower Color
Pink
Flower Size
3.05 cm to 3.56 cm
Bloom Time
Mid spring, Late spring
Planting Time
Spring, Autumn
Harvest Time
Mid summer
Native Area
China
ALSO KNOWN AS

Other names.

en Hall crab apple en Adirondack Crabapple en Hall's crabapple en Hall crabapple en Flowering crab apple
FREQUENTLY ASKED

Reader questions.

How should I water my Hall crabapple tree in the best way?

To promote excellent root development, consider putting a garden hose at the base of your plants. Avoid spraying the leaves directly and be aware that outdoor plants in direct sunlight may need more watering for the leaves. To moisten the roots, you can use bubblers or soaker hoses on each plant. When adding or removing plants, you can use soaker hoses that cover the entire garden or bed to ensure deep root penetration. After watering, ensure any excess water drains and wait for the soil to dry before watering again. To prevent diseases, water at ground level. On sunny days, it can be beneficial to spray the entire bush with water. Whether potted or in-ground, remember that Hall crabapple prefers deep watering rather than light sprinkling.

Why should I put fertilizer on my Hall crabapple plant?

Fertilizing a Hall crabapple is crucial for several reasons. Firstly, it helps produce beautiful blooms. To ensure excellent flowers, it's best to fertilize in early spring. Secondly, fertilizer provides the tree with energy that can be stored during dormant growth phases. By giving extra nutrients during fall planting or late spring, the tree will have more energy to use when active growth resumes.

How many hours of sunlight should the Hall crabapple tree get each day to grow well?

To ensure healthy growth, it is important to provide Hall crabapple with at least 3-6 hours of sun daily. This is the minimum amount of sunlight needed for proper photosynthesis. Although most plants that can tolerate partial sun can also thrive in full sun, they are more adaptable since they require less light for their energy production.

What temperature does Hall crabapple grow best in?

The optimal temperature for Hall crabapple to thrive is between 65 to 80℉ (18 to 27℃). During the primary growing phase, the highest temperature it can tolerate is 95℉ (35℃), while the lowest tolerable temperature is 15℉ (-10℃). This species is able to withstand freezing winters and is considered tolerant of low temperatures. The recommended temperature ranges are as follows: - Ideal: 65 to 80℉ (18 to 27℃) - Highest: 85 to 95℉ (30 to 35℃) - Lowest: -5 to 15℉ (-20 to -10℃) or below.

What should I do if I give too much or too little water to my Hall crabapple tree?

If a Hall crabapple is overwatered, it may develop yellowing leaves that drop off and wilt. The plant may also look unhealthy with mushy stems. When these signs appear, it's best to adjust your watering schedule if possible. Conversely, wilting can also indicate under watering, characterized by crispy, dry leaves. In such cases, check the soil when it's dry and give the plant a thorough watering. Although this will help the Hall crabapple recover, it may still appear dry with yellow leaves due to damaged roots. Once it returns to normal, the yellowing leaves will stop. For Hall crabapples kept indoors, always check the moisture levels and avoid overwatering. Look for signs of black spots and if present, allow the soil in the pot to dry out for a few days before watering again. Overwatering can lead to root rot, so transfer the plant to a different pot if you notice discolored and slimy roots. It's important to prevent root rot by avoiding overly soggy soil. When planting your Hall crabapple outdoors, dig deeper and check the soil moisture with your fingers. If it feels too dry, it may require adequate watering to help the plant recover.

When should I fertilize my Hall crabapple?

Fertilizing Hall crabapple at the right time is crucial. If you use fertilizer too early, while the tree is still dormant, it won't work effectively and can get washed away by rainwater, causing waste and pollution. The first application of fertilizer should be in early spring, followed by monthly fertilization until early summer.

What kind of sunlight does Hall crabapple tree need?

Hall crabapple thrives in full or part sun. It prefers direct morning light, but in the summer, it requires some shade from the intense afternoon sun. In temperate habitats, excessive hot afternoon sun can scorch the leaves, leading to a decline in the plant's overall health and aesthetic appeal.

Do I need to change the temperature for Hall crabapple at different growth stages?

According to research, Hall crabapple trees may show slow growth when exposed to high temperatures, particularly during the development of side buds and main shoots. To promote healthy growth after germination or transplanting, it is recommended to maintain a consistent and cooler temperature of around 65℉ (18℃).

How frequently do I need to water my Hall crabapple?

The Hall crabapple prefers deep and infrequent watering, especially if it is planted in pots. When watering potted plants, it's important to soak them in a gallon of water each time because the limited water storage in pots causes the soil to dry out quickly. In cold regions, watering is needed every 3 to 5 days. It is best to water the plant early in the morning when the soil is dry, both indoors and outdoors. To determine if watering is needed, check the soil inside the pot. If the top 2-3 inches of soil is dry, it's time to give the plant a thorough watering. On hot days, it may be necessary to check the soil moisture daily as the heat can dry out the soil rapidly. If you have a garden, proper irrigation of the soil is also important. In hot climates, water once a week when you notice that about 2 to 3 inches of soil has become too dry, both indoors and outdoors. Be mindful of rainwater on the plant and avoid overwatering to prevent root rot. If there is ample rainfall, additional watering may not be necessary. The Hall crabapple generally grows during spring and fall, so when it is outdoors, adding mulch about 3 to 4 inches deep can help conserve water. Sandy soil drains faster, so plants in this type of soil will require more frequent watering. On the other hand, clay soil retains moisture better, so plants in clay soil can go 2-3 days without watering to allow the soil to dry without developing root rot. Keeping track of watering dates and observing drooping leaves can help determine if watering is needed.

When should I not put fertilizer on my Hall crabapple?

To avoid excessive leaf growth and minimize the number of blooms, it's recommended to use a fertilizer for Hall crabapple that has a lower nitrogen content compared to other nutrients. Additionally, refrain from fertilizing in the late autumn as it can lead to excessive growth before winter. Also, avoid fertilizing during hot and dry times of the year as dry soil is less effective at delivering fertilizer and can stimulate growth that requires additional water. The best time to fertilize is earlier in the season when temperatures are cooler. Lastly, be cautious of unintentionally giving the tree or shrub a double-dose of fertilizer as Hall crabapple can absorb fertilizers applied to nearby plants or lawns.

Can the sun harm the Hall crabapple tree? How can I keep the Hall crabapple tree safe from sun and heat damage?

Indoor Hall crabapple plants are prone to damage from direct sunlight when they are moved outdoors. To prevent sunburn, it is best to gradually move the pots from a shaded area to a brighter spot. However, even plants accustomed to the summer sun can still be harmed by extreme heat. During a heatwave, it is crucial to keep the soil consistently moist to help the plants handle excessive heat levels. To safeguard sensitive Hall crabapple plants during extreme weather, consider moving them to areas with afternoon shade or covering them with a shade cloth.

How can I keep my Hall crabapple tree warm during cold seasons?

When planting Hall crabapple in the ground, it can handle freezing temperatures as long as they don't drop below 15℉(-10℃) in winter. However, if you're planting it in pots or containers, you need to protect the roots from the cold. To do this, wrap the container in a blanket or bring it indoors for complete protection from the winter weather.

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

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