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Watering schedule

How often to water Falconer's Sundew (Drosera falconeri) — the schedule

Also called Falconer's sundew.

More about falconer's sundew

About Falconer's Sundew

Drosera falconeri · also called Falconer's sundew · tropical

Drosera falconeri is one of the most distinctive members of the petiolaris complex, native to the seasonally flooded black-soil plains and paperbark swamps of the Northern Territory, Australia. It produces unusually broad, spoon-shaped to almost circular leaves — the widest of any Drosera in the complex — held on short petioles, and is renowned among carnivorous plant collectors for its striking appearance. The single most critical care requirement is a hot, wet growing season (regularly above 30 °C) followed by a warm dry rest; it is highly intolerant of cold and stagnant waterlogging outside the active season. Drosera is not listed as toxic to cats or dogs by the ASPCA and is considered non-toxic to pets.

Ideal humidity: 65–90% (growing); 40–60% (rest)

Watch for — Rhizome failure during dry season: D. falconeri is particularly sensitive to cool-damp conditions in dormancy — the combination kills the rhizome quickly. Keep minimum temperatures at 18 °C and reduce water to the absolute minimum needed to prevent desiccation during rest.

The watering schedule, season by season

Falconer's Sundew is a bog plant adapted to nutrient-poor wet ground — it must sit in a tray of pure water and must never get tap water or fertiliser. The base rhythm for falconer's sundew is deep tray (growing season); very reduced (rest), but the real interval moves with the season, the light and the pot — so treat the figures below as a starting point and always confirm with the plant itself.

Sit in 3–5 cm of pure water during active growth to replicate seasonal flooding of black-soil plains. Once leaves begin to die back in the dry season, remove from the tray and water only once per week with a small amount of pure water to keep the rhizome viable.

Want this turned into a live reminder that adjusts to your home and the weather? The Growli watering calculator takes your pot size, light and season and returns a starting interval for falconer's sundew in seconds.

How to tell falconer's sundew needs water

A calendar is the worst way to water falconer's sundew. Check the plant and the soil instead — for this species, look for these signals in order:

The most reliable single check is the first one on that list. When two signals agree, water; when they disagree, wait a day and look again — under-watering falconer's sundew for a day is almost always safer than over-watering it.

Overwatering vs underwatering falconer's sundew

The two failure modes can look alike at a glance, so check the soil weight and wetness before you decide. For falconer's sundew specifically:

Signs you are overwatering

Signs you are underwatering

Tap or bottled mineral water kills falconer's sundew. Its roots cannot handle dissolved minerals — only rain, distilled, or reverse-osmosis water will do.

Water quality notes

Only rainwater, distilled or reverse-osmosis water — never tap, mineral or softened water. This is the single most important rule for falconer's sundew.

Seasonal and environmental adjusters

Every figure above shifts with the conditions in your home. For falconer's sundew, the levers that matter most are:

Pot choice is part of this too — work out the right size with the pot size calculator, since a pot that is too big stays wet long enough to rot the roots of falconer's sundew.

Falconer's Sundew watering — frequently asked questions

How often should I water falconer's sundew?

Water falconer's sundew deep tray (growing season); very reduced (rest). Spring and summer: keep the pot standing in 1-2 cm of distilled or rainwater at all times; top the tray up as it is taken up. Winter: keep just damp, not flooded — many temperate carnivores need a cool dormancy with far less water.

How do I know when falconer's sundew needs water?

The tray has run dry (during active growth it should rarely be empty). The peat-based medium feels dry rather than wet. Traps or pitchers shrivel or fail to form. The single most reliable test for falconer's sundew is the first signal on that list — checking the soil or the plant directly always beats watering by the calendar.

What does an overwatered falconer's sundew look like?

Blackening traps or pitchers from stagnant, warm, mineral-laden water. Rotting crown if kept warm and flooded through winter dormancy. Tap or bottled mineral water kills falconer's sundew. Its roots cannot handle dissolved minerals — only rain, distilled, or reverse-osmosis water will do.

What are the signs of an underwatered falconer's sundew?

Traps go limp and brown; pitchers dry up. The medium dries out and the plant collapses quickly.

Can I use tap water on falconer's sundew?

Only rainwater, distilled or reverse-osmosis water — never tap, mineral or softened water. This is the single most important rule for falconer's sundew.

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