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Plant care

How often to water a snake plant.

The snake plant (Dracaena trifasciata, formerly Sansevieria) is famously hard to kill, but most of the deaths come from overwatering. A practical schedule with seasonal adjustments.

By the Pocket Botanist editors ···6 min read

The snake plant, now classified as Dracaena trifasciata (formerly Sansevieria trifasciata, a name still in wide use), is one of the most forgiving houseplants in cultivation. The Royal Botanic Gardens, Kew reclassified the entire Sansevieria genus into Dracaena in 2017 after DNA analysis. The plant itself did not change. The care has not changed either. Most snake plants that die do so because their owners watered them like every other houseplant instead of like a succulent.

Why overwatering is the issue

Snake plants evolved in dry, rocky soils of west Africa. Their thick, fleshy leaves store water for weeks at a time. The roots are shallow and adapted to occasional heavy rain followed by long dry spells. They are not adapted to consistently moist soil, which suffocates the roots and invites the fungal organisms that cause root rot.

Root rot is the single most common cause of snake plant death. The symptoms are deceiving: yellowing leaves, soft mushy bases, and a sour smell from the pot. Many owners interpret yellowing as a sign the plant is dry and water more, which makes the problem worse. If you find a snake plant looking sad, dig a finger into the soil before you reach for the watering can.

A schedule that works

Forget the calendar. Watering by date is the wrong instinct. Instead:

  1. Push a finger 5 cm (2 inches) into the soil.
  2. If you feel any moisture at all, wait. Check again in a few days.
  3. If the soil is bone dry, water thoroughly until it runs out of the bottom of the pot.
  4. Empty the saucer. Never leave the pot sitting in water.

For a rough sanity check: most homes will land somewhere in this range:

  • Spring and summer, bright spot: every 2 to 3 weeks
  • Spring and summer, low light: every 3 to 4 weeks
  • Autumn and winter, bright spot: every 4 to 6 weeks
  • Autumn and winter, low light: every 6 to 8 weeks (or longer)

Seasonal adjustments

In winter, when daylight is short and many homes drop a few degrees overnight, snake plants effectively go dormant. They stop putting on new growth and use almost no water. A snake plant that drinks every three weeks in July might want to be left alone for two months in January. If you keep watering on a summer schedule through the winter, you are very likely to rot the roots.

If your home stays consistently warm and bright through winter, water as you would in summer; the plant takes its cue from light and temperature, not the date.

Reading the leaves

Snake plant leaves are honest signals. Learn what each one usually means:

  • Wrinkled or curled leaves: the plant is thirsty. Water thoroughly. Leaves should plump back up within a day.
  • Yellow leaf bases, soft to the touch: overwatering and probable root rot. Unpot, trim soft roots, dust with cinnamon or rooting hormone, repot in fresh dry mix.
  • Brown crispy leaf tips: usually underwatering, sometimes low humidity. Almost never serious.
  • Pale, washed-out leaves: too much direct sun. Move further from the window.
  • Leggy, spread-open growth: not enough light. Move closer to a window.

Soil and pots

Use a cactus or succulent mix, or amend regular houseplant potting mix with one part perlite or pumice to two parts soil. The mix should feel sandy and drain almost immediately when you water.

Terracotta pots are ideal because they wick moisture out through their walls, which makes overwatering harder. If you use a plastic or glazed pot, water less often than the schedule above suggests.

Is it safe around pets and children?

Mildly toxic. The ASPCA lists the snake plant (under the older "Mother-in-Law's Tongue" common name) as toxic to cats and dogs. The active compound is a saponin, which causes nausea, vomiting, and drooling if chewed. It is not usually life-threatening but is unpleasant. Keep the plant out of reach of pets that chew. If you suspect ingestion, contact a vet or the ASPCA Animal Poison Control Center on (888) 426-4435.

Propagation

Snake plants are easy to propagate, and propagating spare leaves is a good way to back up a beloved plant. The two common methods are leaf cuttings (slow, but produces new plants from a single leaf) and division (fast, requires an established clump). See our explainer on what is plant propagation for the basics.

If you are not sure what you have

Snake plants come in many cultivars; the leaves can look wildly different even within Dracaena trifasciata (cylindrica, laurentii, hahnii, moonshine, and dozens more). Open Pocket Botanist, take a photo, and the app will return the species and the cultivar if it is sure. It is free on iPhone and Android and you do not need an account to start.

Sources

  1. ASPCA, "Toxic and Non-Toxic Plants: Mother-in-Law's Tongue." aspca.org
  2. Royal Botanic Gardens, Kew, "Plants of the World Online: Dracaena trifasciata (Prain) Mabb." powo.science.kew.org

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