Light
Best outdoors in six or more hours of direct sun. More intense light and longer days produce a more compact, more colourful plant. A flytrap getting enough light takes on a subtle yellow hue, with some red on the inside of the traps. Many growers succeed indoors, but it takes a very sunny windowsill paired with strong supplemental lighting.
Soil
1 to 3 parts peat moss to 1 part perlite. More perlite improves aeration and keeps the soil from compacting over time, meaning less frequent repotting and a bit more watering and monitoring of soil moisture. More peat holds water longer, meaning less frequent watering, and peat is typically the cheaper of the two ingredients.
Use pure peat with no fertilizer or other additives. Use plastic or glazed pots rather than unglazed terracotta, which dries out fast and can slowly leach minerals into the mix.
Prefer it ready-made? Get the potting mix we use.
Water
Keep soil damp using rainwater, distilled water, or reverse osmosis water. Most growers like to stand the pot in a tray of water, filled about 1/4 to 1/2 of the way up the pot. Higher water levels are more suitable for the peak growing season with high temperatures and good airflow. Ease off as the season cools and growth slows. During dormancy, keep the pot in a couple of centimetres of water.
Want to know exactly what makes water safe for these plants? Read our full Carnivorous Plant Water Guide for TDS testing, filtration, and RO systems.Humidity
Not a major factor. Flytraps adapt to a wide range of conditions. With that said, many experienced growers find their plants do a little better with some extra moisture in the air. The tray of water the pot sits in creates a pocket of humidity right around the plant, so keep it topped up through the growing season.
Temperature
Tolerates a wide range and handles light to moderate frost without trouble. Heat is rarely a concern for Canadian growers, since even a hot summer here falls well short of what this plant can take. Cold is the one to plan around, and that's what dormancy is for.
Dormancy
Venus flytraps are temperate perennials and grow best with a winter rest every year, triggered by cooling temperatures and shorter days. It runs roughly 3 to 5 months, about October through February in most of Canada. Skip it once and the plant will likely be fine. Skip it several years running and most growers report weakening plants.
During dormancy, growth slows and many traps blacken and die back. Your plant will look pretty bad, and that's normal. It's pulling its energy back into the rhizome instead of the leaves, and with few insects around to catch anyway, resting instead of actively growing is best. As daylight lengthens and temperatures rise in spring, all that stored energy gets pushed into strong new growth.
Leave the pot standing in a shallow tray of water right through winter. A tray that freezes over is not a problem, and a plant sitting in water will see fewer temperature swings and won't dehydrate. During a thaw, check the soil and flood it again if it has dried out. Keep it well watered going into a freeze, since a dried-out top layer loses that insulation and leaves the plant open to frost damage.
Three ways to get it through a Canadian winter, depending on what you have available
- OutdoorsLeave the pot outside in its tray, out of the wind. Pile at least 4 inches over and around it: pine needles are ideal, bagged garden bark mulch works well too. Weed-free straw or hay is a usable fallback, just avoid anything with seed heads. Snow on top of that is insulation, not a problem.
- Unheated spaceA garage, porch, a room with the window open, or a sheltered spot against the side of the house, ideally with nights around 0‑13°C. Daytime warmth is fine as long as the days themselves stay short.
- FridgeLift the plant out of its pot, rinse the soil off the roots, wrap them in damp long-fibre sphagnum moss, seal it in a bag, and refrigerate for the dormancy window above. Check every few weeks that the moss is still slightly damp and free of mould, then pot it back up in spring.
Dormancy is also the easiest time to trim off the dead traps and leaves. See Pruning & Repotting below.
Feeding & Fertilizer
Never fertilize the soil. A flytrap's roots are extremely sensitive to fertilizer.
Catching and digesting insects is what drives strong growth, and outdoors this happens on its own with no help needed. If insects are scarce, there are two ways to help. Feed one or two traps about once a month. A suitably sized live insect triggers its own digestion just by struggling. A freeze-dried bloodworm won't move on its own, so place it in the trap and gently massage the outside until the trap fully seals closed. Misting the leaves with a diluted liquid fertilizer is another option for a plant that isn't catching much on its own.
Pruning & Repotting
Trimming
Trim traps and dead leaves off with scissors once they've gone fully black. Dormancy is the easiest time to tidy up the plant.
Flowers
Flytraps flower in spring, and flowering takes a lot of energy. Unless you want to try for seeds, cut the stalk off when it is about 5 cm tall and the plant will put that energy into producing traps instead. You can stick the cut flower stalk into the soil and it will grow into a new plant.
Repotting
Repot every couple of years into fresh media. This is best done during dormancy, before new growth starts in the spring. A 4 to 5 inch tall pot suits an adult plant.
