How to Grow Venus Flytraps in the UK

Venus Flytraps (Dionaea muscipula) are surprisingly hardy plants, which makes them very easy to care for, provided that their basic needs are met. Before you buy a Venus flytrap, read our article below and research as much as you can to enjoy the best success.

Location

Where should you keep your Dionaea? There are many options available; some are better than others, but all are achievable.

As a Houseplant

Dionaea can be kept as houseplants under certain conditions. They must be kept in a bright, warm window, ideally south-facing. As Dionaea require a period of dormancy during winter, they must be moved somewhere cold for 3-4 months each year to do this.

In the Garden

Where I live, in the Midlands, Dionaea do very well outside all year round. Although they can be kept in single pots, they do particularly well in bog gardens that hold more soil. A bog garden can be anything from a large pot or container to an outdoor trough or even a dug garden at the edge of a garden pond.

In a Terrarium

Whilst Dionaea can be kept in terrariums, they're not really the best habitat for them. Terrariums make it very difficult to offer Dionaea their essential winter dormancy unless you are prepared to only have them as a short-term display.

In a Greenhouse

This is the perfect place to grow your Dionaea! An unheated greenhouse offers an extended growing season compared to growing outside but also gets cold enough in the winter for proper plant dormancy.

Sunlight

Dionaea are temperate plants, but they love baking in the sun throughout the summer. Wherever you keep your Dionaea, make sure you give them as much sunlight as possible. Providing that their roots are cool and wet, they can take as much light and heat as the weather can give them.

Soil

By far the most commonly used soil for Venus flytraps is sphagnum peat moss mixed with an aggregate to prevent compaction and anaerobic conditions. Peat can be mixed with perlite, pumice, vermiculite, sand or gravel. Most growers in the UK (in my experience) mix their peat with perlite with a favoured ratio of 50:50. 

Peat-free Alternatives?

The use of peat as a soil might put some people off growing Venus flytraps. There are some growers in the UK who have been experimenting with different growing media such as coir chunks and live moss. I'm personally not confident in any peat-free alternatives for Dionaea yet, but that may change in the future. You can join the Facebook group 'Peat Free Carnivorous Plants UK' for further information and to continue your own research.

Pot Size

Venus flytraps do not benefit from growing in oversized pots. New divisions are typically put into 9cm pots or smaller. Once the growing point of the plant reaches the edge of the pot, it's time to re-pot. A 1 litre pot is usually ample for Dionaea, but if you want to create a stunning display, you can move up to a 3 litre pot and allow it to become full.

Water

Sit Venus flytrap pots in 1- 2 cm of water throughout the growing season (Spring to Autumn). During the Winter season, Dionaea should just be kept damp.

It's critical that you only use soft water with your Venus flytraps. Soft water is low in minerals, typically below 20ppm (parts per million). You can get soft water 

• Rainwater
• Tap water (if you're lucky!)
• Reverse osmosis water
• Distilled water

In cases of emergency, do not let your plants dry out even if you need to use hard tap water. You can, however, minimise any possible negative effects by flushing the pots with soft water as soon as possible.

Feeding

Dionaea will catch their own food; there is no need to offer additional insects. But it won't do any harm either!

Feeding With Supplements

Venus flytraps can be fed with supplements. Maxsea and Osmocote are brands commonly used by Venus flytraps growers. Please do your own research for appropriate dosage rates.

NB: I do not feed my Venus flytraps at all. They catch lots of insects in the greenhouse and do not appear to need any additional help.

Propagation

Division

Because Venus flytraps grow from a rhizome it's incredibly easy to divide them. New plantlets will emerge from the plant's rhizome as it grows. The new plant can literally be separated from the mother plant.

Seeds

Seeds can be purchased online or collected from Dionaea flowers at home. Seeds must experience cold stratification in order to germinate. Exposing the seeds to extreme cold makes them 'think' that they've experienced Winter and must get ready to germinate in the Spring/ Summer.

I sow mine in the greenhouse at the end of January so that they experience natural frosts. They are sown directly onto peat in a pot with a light dusting of fine peat on top. Then, the pots are placed in a tray of water.

After a few months, the first signs of life start to emerge from the soil.

Pruning & Re-potting

Any Dionaea re-potting should ideally be carried out during Winter or early Spring. This is because the plants are dormant at this time and so are totally unaffected by the disturbance. However, any dead or decaying material can be cut off at any time.

Should You Remove Venus Flytrap Flowers?

This is an age-old question that comes up every year! Read our article 'Should You Cut Off Venus Flytrap Flowers?' specifically on this subject.