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Vanilla, or Vanilla planifolia, is a vining orchid native to Mexico and is one of the most sought-after spices in cultivation. Vanilla is grown mostly for commercial production in Madagascar, Reunion Island, the Comoro Islands, Indonesia, and Mexico. Vanilla orchids are challenging to grow and require carefully controlled conditions and a frost-free climate, making a greenhouse ideal. They grow well in bright, filtered shade and high humidity. In Australia, vanilla production is limited, with about 15 commercial growers situated between the required growing latitudes 20° north and south of the Equator. However, the development of automated dome greenhouses is helping to expand vanilla cultivation in the country.
| Characteristics | Values |
|---|---|
| Plant type | Climbing vine |
| Species | Vanilla planifolia |
| Growing conditions | High humidity, warm temperatures, bright indirect sunlight, no frost |
| Container | Support needed for vine to climb, e.g. post or slab of wood |
| Potting mix | Equal parts orchid bark and potting mix, with excellent drainage |
| Fertilizer | Orchid fertilizer, every two weeks during spring and summer |
| Pruning | Optional, for vine length management |
| Propagation | Via stem cuttings with at least six growth nodes |
| Greenhouse | Recommended for controlled conditions and to prevent frost |
| Common uses | Flavouring for desserts and beverages, perfumes |
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What You'll Learn
Container and support
Vanilla bean orchids can be grown in a variety of containers, including clay pots of 12 inches or more, which offer size, stability, and room for a healthy root system. The pots should have excellent drainage with a porous potting mix and a drainage hole at the bottom. The growing medium should be kept damp, but the potting mix should be allowed to dry out slightly between waterings to prevent root diseases. The ideal temperature for vanilla orchids is between 60 to 70°F at night and 80 to 95°F during the day. They require high humidity, and it is recommended to mist the plant regularly to maintain an 80% humidity level. Good air circulation is necessary to prevent fungal rot.
Vanilla bean plants are climbing vines that require support. In their native jungle habitat, they climb up tree trunks. When grown in a container, they need a support structure to climb on and attach themselves to. This can be a post or slab of wood, preferably a type that does not rot easily, such as cedar or cypress. A simple lumber structure or trellis can also be used to provide support for the vine to climb and attach to as it grows upward. The vine should be tied to the support, and any offshoots that occur should also be tied to the structure.
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Light requirements
Vanilla orchids grow best in bright, filtered, indirect sunlight. They prefer warm temperatures and high humidity. Morning sun is ideal, but they can also tolerate short periods of afternoon sun, as long as it is not the hot, noonday sun or the direct afternoon sun that is common in south- and west-facing windows. If you are growing your vanilla orchid indoors, place it in a spot that receives bright, indirect light.
If you are growing your vanilla orchid outdoors, it is important to provide some shade. You can do this by placing the plant under the shade of a larger tree, such as a date palm tree, as one grower in Australia has done. Alternatively, you can create a physical structure to provide shade, such as a simple lumber structure or a lattice, keeping in mind that the structure will eventually be obscured by the vine as it matures.
Vanilla orchids are native to tropical forests, so it is important to try to recreate their native jungle habitat. This can be achieved through a combination of temperature controls, misting, and irrigation. Maintain temperatures between 60 to 70°F at night and 80 to 95°F during the day, and mist your plant regularly to keep the humidity level at 80%.
While vanilla orchids prefer bright light, they will not grow well or flower in deep shade. If you are looking for a plant that thrives in deep shade or limited light conditions, you may want to consider other low-light houseplants.
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Temperature and humidity
Vanilla orchids are native to tropical forests and require warm temperatures and high humidity to thrive. In Australia, vanilla orchids can be grown in automated dome greenhouses, which help recreate their native jungle habitat.
The ideal temperature range for vanilla orchids is between 60 to 70°F (15.5 to 21°C) at night and 80 to 95°F (26.6 to 35°C) during the day. These plants are sensitive to frost and cold temperatures, so they must be grown in a greenhouse or kept as a houseplant in controlled conditions if you live in a non-tropical climate.
To maintain high humidity, mist your vanilla orchid regularly and aim to keep the humidity level at around 80%. Good air circulation is essential to prevent fungal rot. The growing medium and wooden trellis structure should be kept damp as the plant develops "air roots" that absorb moisture from the air. However, allow the potting mix to dry slightly between waterings to prevent root diseases.
In terms of sunlight, vanilla orchids prefer bright, indirect light and filtered shade. They can tolerate short periods of morning sun but should be protected from direct afternoon sun, especially from south- and west-facing windows.
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Drainage and nutrients
Vanilla bean orchids need excellent drainage and nutrients to nourish the plant while the vine develops. The orchid is semi-terrestrial, meaning its roots attach to tree trunks or other supports from which it takes in water and nutrients. When growing a vanilla vine in a pot, it is recommended to use a clay pot of 12 inches or more to give the orchid size, stability, and a healthy root system. The pot should have a porous potting mix and a drainage hole at the bottom. The potting mix should be allowed to dry out slightly between waterings to prevent root diseases, but the environment must maintain high humidity. The ideal temperature for vanilla orchids is between 60 to 70°F at night and 80 to 95°F during the day. These plants are not frost-tolerant, so those living in non-tropical climates should grow them in a greenhouse.
Vanilla orchids should be watered regularly, and the humidity level should be maintained at 80%. Good air circulation is necessary to prevent fungal rot. The orchids can be fertilized every two weeks during spring and summer with orchid fertilizer. Light but consistent fertilization is recommended, and the amount should be as per the product instructions. The orchids develop "air roots" that draw moisture from the air, so the growing medium and wooden trellis structure should be kept damp.
The vanilla orchid grows wild in tropical forests, so it is important to recreate its native jungle habitat using temperature controls, pampering mists, and irrigation. It grows best in bright, filtered shade and high humidity, tolerating short periods of morning sun with bright indirect light. It should be avoided to place the plant near south- and west-facing windows, as the direct afternoon sun is too harsh for this species.
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Flowering and pollination
Vanilla orchids are challenging to coax into flowering. They require carefully controlled conditions and a frost-free climate, so a greenhouse is ideal. The ideal temperatures for vanilla orchids are between 60 to 70°F at night and 80 to 95°F during the day. They prefer bright, filtered shade and high humidity.
To encourage flowering, the vine should be tied to a support structure, such as a post or slab of wood, and allowed to climb. The vine should be tied to the support as it grows, and offshoots should also be tied to the support. Once the vine reaches the top of the support and starts to hang off, it will begin to flower.
The flowers are slightly fragrant, but it is the bean pod that follows flowering that is the main prize. To produce the seeds from which vanilla is harvested, hand pollination is required.
Vanilla orchids are native to Mexico and are challenging to grow from seed. They are normally propagated via stem cuttings, with each cutting requiring at least six growth nodes.
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Frequently asked questions
Vanilla plants require high humidity, warm temperatures, and bright, indirect sunlight. They grow well in partial sun, but not in deep shade. They are sensitive to frost, so a greenhouse is ideal.
Vanilla orchids grow best in a mixture of orchid bark and potting mix. Ensure your pot has excellent drainage and a drainage hole at the bottom.
Regularly mist your vanilla orchid and maintain a humidity level of 80%. Fertilize every two weeks during spring and summer with orchid fertilizer. Keep the growing medium and wooden trellis structure damp, as the plant develops "air roots" that draw moisture from the air.
Vanilla orchids are slow-growing vines, so they need a stake or trellis to climb on. They can take a long time to flower, and once they do, the vanilla bean pod that follows is the prize.
