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Watering schedule

How often to water Lance-leaved Sundew (Drosera adelae) — the schedule

Also called Lance-leaved sundew, Adelaide's sundew.

More about lance-leaved sundew

About Lance-leaved Sundew

Drosera adelae · also called Lance-leaved sundew, Adelaide's sundew · tropical

Drosera adelae is a carnivorous sundew native to the rainforest gullies of north-east Queensland, Australia, where it grows in shaded, humid conditions along stream banks. Unlike most of its tropical Australian relatives it thrives in lower light and consistent year-round moisture, making it one of the more forgiving sundews for indoor cultivation. The single most important care fact is that it must never dry out — the tray method (1–2 cm of pure water beneath the pot at all times) suits it perfectly. Drosera is not listed as toxic to cats or dogs by the ASPCA and is considered non-toxic to pets.

Ideal humidity: 60–90%

Watch for — Mineral burn from tap water: Chlorine, fluoride, and dissolved salts in tap water accumulate in the nutrient-poor soil and cause leaf-tip browning and root die-back. Always use rain, distilled, or RO water.

The watering schedule, season by season

Lance-leaved 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 lance-leaved sundew is keep tray topped up year-round, 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.

Use the tray method with 1–2 cm of rain water, distilled water, or reverse-osmosis water at all times. Tap water contains minerals that accumulate and damage roots; never use it.

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 lance-leaved sundew in seconds.

How to tell lance-leaved sundew needs water

A calendar is the worst way to water lance-leaved 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 lance-leaved sundew for a day is almost always safer than over-watering it.

Overwatering vs underwatering lance-leaved sundew

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

Signs you are overwatering

Signs you are underwatering

Tap or bottled mineral water kills lance-leaved 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 lance-leaved sundew.

Seasonal and environmental adjusters

Every figure above shifts with the conditions in your home. For lance-leaved 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 lance-leaved sundew.

Lance-leaved Sundew watering — frequently asked questions

How often should I water lance-leaved sundew?

Water lance-leaved sundew keep tray topped up year-round. 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 lance-leaved 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 lance-leaved 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 lance-leaved 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 lance-leaved sundew. Its roots cannot handle dissolved minerals — only rain, distilled, or reverse-osmosis water will do.

What are the signs of an underwatered lance-leaved sundew?

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

Can I use tap water on lance-leaved sundew?

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

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