Pachycereus pecten-aboriginum (commonly known as hairbrush or Indian comb) is a columnar cactus plant native to Mexico. They can grow up to 15 m (49 ft) high. The trunk of this species is 1.2 to 5.0 m tall and the fruits are large and burr-like. The specific name, pecten-aboriginum, is from the Latin, and means "native combs". It was inspired by the use of the fruits as hair combs.
Hairbrush has strong resistance to disease and can tolerate normal care without becoming ill easily. That said, it can be vulnerable to mealybugs; these pests can cause some harm but typically do not pose a major danger. Regarding care, Hairbrush tolerates drought and does not need frequent watering. It can go long stretches without water and requires little fertilizer. However, it is very prone to root rot if kept in poor lighting and given too much water. In summary, Hairbrush is a good choice for people who prefer low-maintenance plants, but it remains important to learn and satisfy its basic needs. It is especially appropriate for those who are away for extended periods and might forget to water regularly.
How to keep Pachycereus Pecten Aboriginum.
Light
Hairbrush does best in locations with abundant exposure to sunlight throughout the day. In its native range it occurs in places that receive generous sunshine. Too little light can stunt its growth, while too much can cause scorching. Its light preference remains largely the same at different growth stages.
Water
The hairbrush plant flourishes in arid regions with very little moisture, needing water only once every three weeks. Its ability to tolerate drought makes it perfect for xeriscaping, as it has the capability to store water internally. While it is generally grown outdoors, the hairbrush plant is an excellent choice for landscapes that aim to reduce irrigation requirements.
Temperature
Native to warm habitats, the hairbrush prefers temperatures from 68 to 100 °F (20 to 38 °C). If you live in a cooler climate, it's best to keep this plant indoors during the colder months.
Fertilizer
For Hairbrush, light applications of fertilizer once or twice a year during the growing season are adequate. Do not fertilize in winter or summer when the plant is dormant. Cut back on fertilizer for repotted plants and wait a couple of months after repotting before applying any. Fertilizing promotes healthy growth and encourages flowering.
Pruning
A hairbrush plant needs only minimal pruning. Concentrate on removing any withered flowers and branches to help the plant effectively allocate nutrients toward healthy growth.
Pot & Repot
Repot the Hairbrush in spring or summer, selecting a pot slightly larger than the current one with good drainage. Use a well-draining, sandy or gritty cactus mix. Handle it carefully to avoid the spikes. Let the cactus dry out before repotting to prevent root rot. After repotting, wait for a week before watering so the roots can heal.
Botanical profile.
- Plant Type
- Tree
- Life Cycle
- Perennial
- Genus
- Pachycereus
- Family
- Cactaceae
- Hardiness Zone
- 9-11
- Mature Height
- 14.94 m
- Mature Spread
- 1.22 m
- Leaf Color
- Green, Blue
- Leaf Type
- Evergreen
- Flower Color
- White
- Flower Size
- 5.08 cm to 7.62 cm
- Bloom Time
- Mid spring, Late spring, Early summer
- Planting Time
- Spring, Summer, Autumn, Winter
- Harvest Time
- Mid summer, Late summer, Early fall
- Native Area
- Mexico
Other names.
Reader questions.
How should I wet my hairbrush properly?
To make watering easier for this species, it is recommended to water from the bottom. This allows for proper absorption of water by the roots, which helps circulate nutrients throughout the entire plant. Avoid spilling water on the top part, as it can lead to diseases and fungi. If you have an irrigation system, use small sprinklers, especially for Hairbrushed plants in the garden. Opt for revolving sprinklers that allow you to change the water delivery patterns as needed. Avoid using sprinklers on windy days. Regardless of whether the Hairbrush is in a pot or in your garden, use the soak and dry method, which helps distribute moisture evenly across the root systems for healthier growth. Some owners might consider a built-in drainage system, which involves placing layers of porous materials like recycled glass or hydro stones beneath the soil. These layers act as reservoirs for excess water, but be cautious not to over-water the plant through these built-in systems.
Why should I put fertilizer on my hairbrush?
The Fertilizing Hairbrush is used to add nutrients to the growing medium, which helps support healthy growth. While it does store water and nutrients, applying plant food during the growing season can further enhance this process. Additionally, fertilizing can also encourage mature specimens to produce blooms during this time.
What are the sunlight requirements for Hairbrush plants?
Hairbrush plants require more than 6 hours of sunlight daily to thrive. It's important to observe how sunlight moves through your garden, selecting locations that offer a balanced mix of light and shade to meet the plant's needs. Sufficient sunlight is crucial as it heavily influences the plant's growth and health.
What are the ideal growing conditions for Hairbrush?
Hairbrush thrives in warm environments and prefers temperatures ranging from 68 to 100 °F (20 to 38 °C). It's a heat-loving plant that slows its growth and enters dormancy in the winter. For those in cooler climates, it’s advisable to grow the plant indoors during colder seasons. When temperatures drop below 32°F (0°C), the plant should be moved indoors, placed near a south-facing window for maximum sunlight. If natural light is insufficient, supplemental lighting is recommended. Once temperatures fall below 68°F (20°C), its growth slows, and watering should be reduced or stopped to prevent root rot. It's also recommended to completely halt outdoor watering and potentially insulate the plant with a temporary greenhouse or wrap during very cold temperatures.
What do I do if I put too much or too little water on my hairbrush?
If your Hairbrush plant turns yellow, it could be a sign of underwatering or overwatering. Overwatering can lead to fungal infections, so make sure to let the soil dry out and avoid overwatering. If the plant is getting too much moisture, you may notice brown leaves and dropping. On the other hand, lack of water can cause yellow tips on the stems and branches. Before buying a Hairbrush plant, ask if the soil drains properly. Poor drainage can lead to insufficient water for the plant in the future. The plant can also die if it's constantly overwatered or exposed to too much rain when planted outside. If possible, use rainwater or distilled water, as the plant doesn't like minerals in its water. Signs of excessive moisture include squishy stems, drooping growth, and discolored parts. Allow the plant to recover by letting the pot dry out and consider transferring it to a new container to prevent root rot. If planted outside, transfer it to a pot, especially in winter, to aid in its recovery.
When should I put fertilizer on my hairbrush?
Hairbrush plants only require a small amount of fertilizer during the growing season, typically 1-2 times a year. It is recommended to fertilize in the spring and autumn, avoiding winter and summer when the plant is dormant. When repotting, be cautious and reduce the amount of fertilizer used. It is also advisable to wait a few months after repotting before applying any fertilizer.
What are the essential lighting conditions for Hairbrush plants?
Hairbrush plants flourish best in environments with ample sun exposure throughout the day, as they are native to regions where sunlight is abundant. Both too little and too much light can adversely affect the plant's development, either by stunting growth or causing scorching. The plant's need for light remains consistent across different growth stages. When natural light is insufficient, especially during winter or in less sunny spaces, artificial lighting can be an effective solution. LED lights, being customizable to specific plant needs, are ideal for indoor Hairbrush plants, providing them with the required 8-12 hours of light per day at a recommended distance of 12-36 inches above the plant.
How does low temperature affect Hairbrush and what are the solutions?
Hairbrush is not tolerant of low temperatures and shows optimal growth above 68°F (20°C). During winter, maintaining the temperature above 32°F (0°C) is crucial. Exposure to temperatures below 23°F (-5°C) can lead to weakness, wilt, and susceptibility to root rot. Initial symptoms of frost damage might not be apparent but can lead to gradual withering after a week. To address frost damage, trim frostbitten areas and check for root rot. If found, cut off the rotted roots and propagate the plant through cuttings. Moving the plant to a warm environment indoors near a south-facing window can help, and supplemental lighting should be used if sunlight is inadequate.
How many times should I water my Hairbrush?
Watering frequency for succulents can vary depending on the season. In the summer and spring, you typically only need to water them once every two to three weeks. However, during the winter and fall, it's best to reduce or avoid watering altogether since these plants become dormant. It's important to let the soil dry completely before watering again. It's better to slightly underwater than to overwater. When potted, deep watering at intervals promotes healthier soil growth. When planted outdoors, avoid watering lightly as this encourages shallow root growth. Instead, wait a few weeks and only water when the surrounding soil is too dry.
When should I not put fertilizer on my hairbrush?
Hairbrush, like other plants, goes through a period of dormancy. This is when you should avoid applying fertilizer. During the summer and winter, the plant stops growing and it's best to refrain from fertilizing. Similarly, it's recommended to stop fertilizing for a few months after repotting in the spring.
What symptoms indicate insufficient light in Hairbrush plants?
Symptoms of insufficient light in Hairbrush plants include smaller new leaves, leggy or sparse growth, premature leaf drop, halted or slow growth, lighter-colored new leaves, and various signs of distress such as chlorosis, sunscald, leaf curling, wilting, and leaf scorching. These symptoms reflect the plant's struggle in suboptimal lighting, displaying its need for appropriate lighting conditions to maintain health and vigor.
What should be done when Hairbrush experiences high temperature?
During the summer, keep Hairbrush's exposure below 100°F (38°C). Temperatures exceeding 109°F (43°C) halt its growth, cause water loss, wilting, and increase the risk of sunburn. To help the plant recover from sunburn or root rot due to high temperatures, remove sunburned and rotten parts. Protect the plant from direct afternoon sunlight until it recovers. If the plant has suffered from root rot, cease watering until new roots develop.