Haworthia cymbiformis
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Haworthia cymbiformis

Cathedral Window · Boat-formed haworthia · Window boats · Boatleaf Howorthia

Tier 1 Difficulty: hard Water: low Light: partial_sun Toxicity: low
Water every
7 days
Temperature
20–37 °C
Soil pH
6–7
Hardiness
Zone 10–11
Click count
673
Observations
2,465

Description

Source: leafsnap

Haworthia cymbiformis is a small succulent plant that belongs to the Asphodelaceae family. Native to South Africa, it is commonly known as the Cathedral Window Haworthia due to its unique leaf arrangement. The plant features thick, fleshy leaves that grow in a rosette pattern. These triangular leaves have pointed tips and are green with white stripes or spots, giving them an attractive appearance. Haworthia cymbiformis typically grows up to 10 cm tall and 15 cm wide, making it an ideal indoor plant for small spaces or as part of a succulent garden display. It thrives in bright but indirect sunlight and requires well-draining soil with occasional watering during the growing season. During the summer months, the plant produces small white flowers on long stems, adding further interest to its already striking appearance. This succulent is easy to care for and can be propagated by separating offsets from the mother plant or through leaf cuttings. Its unique shape and attractive foliage patterns have made it popular among collectors, making it a must-have addition for any succulent enthusiast's collection.

💡 Haworthia cymbiformis uses translucent tips as a strategy to cope with intense sunlight and maximize light absorption. This unique characteristic allows sunlight to penetrate deeply into the leaves, similar to light passing through a window, reaching the plant's inner parts. In its natural habitat, Haworthia cymbiformis retracts into the ground during the summer, yet it can still receive light through these transparent tips.

🌳 Cathedral window haworthia has distinct leaves with small transparent zones that let sunlight pass through even on overcast days, allowing photosynthesis to continue without interruption. Bonsai enthusiasts find these leaf "windows" appealing, making the cathedral window haworthia a popular choice for indoor decoration. The arrangement of these windows has also drawn the interest of solar cell researchers, who are studying ways to improve solar absorption inspired by the haworthia's design.

Care Guide

💧 Water Every 7 days

The Cathedral Window Haworthia, native to South Africa, is a drought-tolerant succulent that thrives in well-draining soil. Water it every two weeks, allowing the soil to dry out in between waterings. This plant is well-suited for indoor growth and needs pots with good drainage to prevent root rot and maintain a proper moisture balance.

Suggested frequency: Every 7 days
FAQ
How should I water my Cathedral window haworthia plant?

To properly water your Cathedral window haworthia, follow these steps: 1. Wait until spring when new leaves are growing before watering. 2. Only water when the soil in the pot is completely dry. 3. You can use tap water or distilled water. 4. Avoid watering from overhead and instead water at the base of the plant. 5. Apply water slowly and evenly across the surface of the soil. 6. This method will moisten the soil without wetting the above-ground parts of the plant. 7. Water until you see a light stream of excess water draining from the pot's hole.

What should I do if I give my Cathedral window haworthia plant too much water or too little water?

Overwatering is a common problem for Cathedral window haworthia plants and can be very harmful to their health, even causing them to die quickly. To avoid overwatering, it is important to let the soil dry completely before watering. Many people make the mistake of watering their plant incorrectly, especially during dormancy. In this situation, we will focus on the solution to overwatering. If your Cathedral window haworthia shows signs of overwatering, it is best to remove it from its current pot. Then, examine the roots and remove any that show signs of rot or moisture-related disease. Some roots may simply need to be cleaned and will recover. Finally, repot the plant in well-draining soil to prevent future overwatering. However, underwatering can also occur, although it is less common. In this case, simply water your plant slightly more frequently, being careful not to overcorrect and overwater.

How much water does my Cathedral window haworthia need?

The water needs of Cathedral window haworthia, a succulent plant, are lower compared to other plants due to its hot and dry native region. To care for this plant, allow the soil to completely dry out between waterings. Typically, it takes about two weeks to a month for the soil to dry completely. Watering frequency is influenced by the seasons. During spring and summer, when the plant is in a growing state, it may take 2-3 weeks for the soil to dry. In summer, the soil may dry out faster. When the temperature is below 60 degrees or above 85 degrees Fahrenheit, the plant will be dormant or semi-dormant and does not require watering. Instead, keep the soil dry until the temperature is suitable for growth and then resume watering.

How much water does my Cathedral window haworthia plant require?

Cathedral window haworthia doesn't need much water overall. It can go without water for a while. But when it is time to water it, you should give it a lot. There isn't a specific amount, but you should keep watering until the soil is completely moist. If you are growing it in a pot, make sure to water until you see water trickling out of the drainage holes. To check if you have watered enough, insert a pencil into the soil and remove it. If it is moist, then you have provided enough water.

How do I know if I'm watering my Cathedral window haworthia plant enough?

Overwatering is a bigger concern than underwatering. When a plant is overwatered, you can tell immediately as the leaves will become mushy, lose their shape, and change colors. This is very different from healthy leaves, which should be firm and hold their form. Underwatering is rarely a problem for Cathedral window haworthia because this species can often survive without any water. However, if underwatering does happen, you will usually notice that the leaves become discolored and dry.

☀️ Light Partial sun

The cathedral window haworthia is a hardy plant that grows best in moderate sunlight, yet can tolerate both intense sun and very low light. However, too much sun can cause sunburn, while too little can impede its growth. Its ancestry in habitats with varying light levels gives it this adaptable trait.

Ideal: Partial sun
FAQ
What are the sunlight requirements for Cathedral window haworthia?

Cathedral window haworthia requires partial sun, which means about 3-6 hours of sunlight a day. However, it can also thrive in conditions of full sun or full shade, with full sun requiring above 6 hours of sunlight. It's important to observe how sunlight moves through your garden and select areas that balance light and shade optimally for your plants. This ensures their health and happiness.

How does Cathedral window haworthia adapt to different sunlight conditions?

The Cathedral window haworthia is known for its resilience and ability to flourish in moderate sun, withstand a lot of sun, or even adapt to very little sunlight. An excessive amount of sun can lead to sunburn, while insufficient sun might impede its growth. Originating from habitats where sunlight varies, this species has adapted to a wide range of sunlight conditions. For optimal growth indoors, especially in places with limited natural light or during winter, artificial lighting, like LED lights that mimic sunlight, can be used. These should provide 10-50W/sq ft depending on the plant's sunlight needs, be placed 12-36 inches above the plant, and turned on for 8-12 hours per day to simulate natural daylight hours.

What are common symptoms of improper light exposure in Cathedral window haworthia, and how can they be addressed?

Cathedral window haworthia exhibits several symptoms when exposed to improper lighting. Insufficient sunlight can result in pale or irregularly colored leaves, leggy growth, smaller leaves, and slowed or ceased growth, indicating a lack of chlorophyll and nutrients. Conversely, excessive sunlight can cause chlorosis (yellowing of leaves), sunscald, leaf curling, wilting, and leaf scorching. To remedy these issues, gradually adapt your plant to desired light conditions. Indoor plants can benefit from supplemental artificial lighting, while outdoor plants should be moved progressively to sunnier spots. For plants in the ground, pruning surrounding obstructions or transplanting to brighter locations can improve sunlight access. It's crucial to make changes gradually to prevent sunburn and ensure healthy new growth.

🌡️ Temperature 20–37.8°C

Cathedral window haworthia does best in temperatures from 68 to 100 ℉ (20 to 38 ℃). In its native habitat it adjusts to both cooler and warmer conditions depending on the season. In summer it needs increased ventilation to avoid overheating. In winter it prefers cooler conditions, about 50 to 60 ℉ (10 to 15 ℃), and can withstand some frost.

Ideal temperature: 20–37.8°C
FAQ
What temperature range is preferred by Cathedral window haworthia?

Cathedral window haworthia thrives in a temperature range of 68 to 100°F (20 to 38°C). It adapts well to varying temperatures throughout the seasons in its native habitat, requiring higher ventilation during the hotter summer months. To avoid heat stress, ensure proper airflow. In winter, cooler temperatures between 50 and 60°F (10 to 15°C) are preferable, and the plant can endure some frost. Since winter is the growing season, maintain temperatures above 20°C for optimal growth. Should the temperature fall below 5°C, it's advisable to move the plant indoors to a well-lit area, adjusting watering according to temperature changes. For plants overwintering outdoors, a sheltered spot with ample sunlight is optimal. In consistently low temperatures, consider a temporary greenhouse to protect the plant, keeping it adequately moist.

How does Cathedral window haworthia react to low temperatures?

Cathedral window haworthia shows a preference for temperatures between 20°C and 38°C, demonstrating low tolerance for extreme cold. During the winter, temperatures should not drop below 5°C. Exposure to temperatures below 1°C can cause the leaves to appear water-soaked, leading to necrosis and wilting. Although mild frost may not immediately show symptoms, affected leaves will wilt and detach within a week. To remedy frost damage, trim the affected areas and move the plant to a warmer, well-lit indoor space, preferably near a south-facing window, or set up a makeshift greenhouse. This greenhouse should have adequate ventilation to prevent decay caused by poor air circulation.

What should be done if Cathedral window haworthia is exposed to high temperatures?

During the summer months, it's crucial to keep Cathedral window haworthia's temperature below 100°F (38°C). Temperatures above 109°F (43°C) will push the plant into dormancy, increasing its susceptibility to rot, particularly in humid conditions. In such cases, remove any dry or rotten parts of the plant and relocate it to an area with partial shade, especially safeguarded from direct midday and afternoon sun. Watering should be halted until the weather cools, to prevent exacerbating the condition.

💨 Humidity dry (<40%)

This plant prefers dry conditions, so don't mist it. However, watering it less often can also thrive in higher humidity.

Humidity: dry (<40%)
🪴 Soil 6-7
Soil pH: 6-7
🌱 Fertilizer

Cathedral window haworthia benefits from light fertilizer applications once or twice a year during the growing season. Avoid fertilizing in winter and in summer when it is dormant. Use less fertilizer on repotted plants and wait a couple of months after repotting before applying fertilizer. Fertilizing supports healthy growth and encourages flowering.

FAQ
Why should I put fertilizer on my Cathedral window haworthia?

To promote healthy growth in Cathedral window haworthia, it is recommended to fertilize the growing medium. Although it already stores water and nutrients, adding plant food during the growing season provides additional support. Fertilizing also stimulates mature specimens to produce blooms during this time.

When should I fertilize my Cathedral window haworthia?

Cathedral window haworthia plants require minimal fertilizer and should only be fertilized during the growing season, which is recommended to be done 1-2 times a year. It is best to fertilize them in the spring and autumn, while avoiding fertilization during the plant's dormant periods in winter and summer. When repotting, be cautious with the amount of fertilizer used and consider reducing the quantity. It is also advised to wait a few months after repotting before applying any fertilizer.

When is the best time to not fertilize my Cathedral window haworthia?

The Cathedral window haworthia, like other plants, goes through a dormancy period. During this time, it's best to avoid applying fertilizer. In both summer and winter, the plant stops growing, making it important to halt fertilizer application. Additionally, after repotting in the spring, it's recommended to refrain from fertilizing for a few months.

What kind of fertilizer does my Cathedral window haworthia plant need?

When fertilizing Cathedral window haworthia, it is recommended to use a liquid plant food specifically made for succulents and cacti. Dilute the fertilizer with an equal amount of water to prevent it from accumulating in the soil. Apply the fertilizer to the base of the plant and make sure to water it thoroughly. This will help excess moisture drain away.

How should I add fertilizer to my Cathedral window haworthia?

When fertilizing Cathedral window haworthia, it is easier to use liquid plant food, although you can also use granules. Follow the instructions on the packaging and dilute liquid fertilizers to half-strength. Regardless of the type of plant food you choose, always apply it to the soil. For granules, cover them with a thin layer of soil and water the plant.

🪴 Pot & Repot Every 2 years

When repotting Cathedral window haworthia, choose a pot slightly larger than the current one that has good drainage. Use a gritty, well-draining succulent or cactus mix. Gently remove the plant from its old pot, brush off extra soil, and plant it at the same depth. Wait a few days before watering so any root damage can heal. Repot in spring or fall and place it in a brightly lit spot.

Suggested frequency: Every 2 years
✂️ Pruning

This is very important for these plants. Use sterilized and sharp scissors and trim as many rosettes, leaves, or stems as needed. Trimming any leggy sections is also great to encourage new growth.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Haworthia cymbiformis is a non-toxic succulent. It is widely used as a houseplant not only because of its beauty but also because it is safe. It is guaranteed that these plants are safe around pets and children.

Characteristics

Plant Type
Succulent, Herb
Life Cycle
Perennial
Genus
Haworthia
Family
Asphodelaceae
Hardiness Zone
10-11
Mature Height
8 cm
Mature Spread
10 cm
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
White
Flower Size
0.51 cm to 1.02 cm
Bloom Time
Spring, Winter
Planting Time
Spring, Summer, Autumn
Harvest Time
Spring, Early summer
Native Area
South Africa

Tags (23)

Common Names (4)

en Cathedral Window
en Boat-formed haworthia
en Window boats
en Boatleaf Howorthia