Growli

Plant care

Wood's Cycad (Wood's Encephalartos) care

Encephalartos woodii

Also called Wood's Encephalartos.

RHS H2USDA 9-11Toxic to petsIndoor Up to 6 m over many decades in habitat

Watering rhythm

10-14days

When the top 5 cm of mix is dry, roughly every 10-14 days in growth

Light

Bright indirect light (just back from a sunny window)

Soil

Gritty, free-draining cactus or palm mix

Humidity

40-60%

Temp

18-30°C

Pet safety

Toxic to pets

Mature size

Up to 6 m over many decades in habitat

Care at a glance

Light

In the wild wood's cycad grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Give it the brightest spot you have, ideally a few hours of direct sun through a south or west window. In low light, fronds stretch and weaken and new flushes stall. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for when the top 5 cm of mix is dry, roughly every 10-14 days in growth for wood's cycad, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Water deeply, then let the mix dry well before the next drink. The swollen caudex stores water, so it tolerates drought far better than sogginess. Cut back sharply in winter.

Soil and pot

Wood's Cycad grows best in gritty, free-draining cactus or palm mix. Use a coarse blend of cactus compost cut with pumice, perlite or grit. The roots rot fast in dense, water-holding soil, so prioritise drainage over richness. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Wood's Cycad sits happiest at around 40-60% humidity and 18-30°C (64-86°F). Tolerates average household humidity well. It is far more sensitive to wet roots and cold than to dry air, so no misting is needed. If you keep the room above 18 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed wood's cycad sparingly. Feed monthly through spring and summer with a balanced liquid feed at half strength, or use a slow-release palm/cycad fertiliser once in spring. Cycads benefit from supplemental magnesium; do not feed in winter. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on wood's cycad in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Root and caudex rotThe single most common killer. Caused by dense soil or overwatering; the trunk softens and browns. Use gritty mix and let it dry between waterings.
  • Stalled growthCycads naturally produce only one frond flush per year. A specimen that never flushes is usually too dark, too cold or pot-bound.
  • Scale insectsCycad scale and soft scale cling to frond undersides and crowns. Wipe off and treat with horticultural oil; inspect new fronds regularly.
  • Yellowing frondsOlder fronds yellow naturally with age, but widespread chlorosis signals magnesium or manganese deficiency or waterlogged roots.

Propagation

Propagated commercially from offset 'pups' at the base of the trunk, as the species is functionally extinct with no known females and cannot set seed. Detach rooted offsets and pot in gritty mix; expect very slow establishment. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Wood's Cycad is toxic to pets. Toxic to cats and dogs. All cycads (order Cycadales, including Encephalartos) contain cycasin, mirroring the ASPCA's classification of the sago palm (Cycas) as toxic. Ingestion causes vomiting, diarrhoea, severe liver failure and neurological signs; seeds are the most poisonous part. Treat any ingestion as a veterinary emergency. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Wood's Cycad care — frequently asked questions

What is the common name for Encephalartos woodii?

Encephalartos woodii is most commonly called Wood's Cycad, but it is also known as Wood's Encephalartos. The names refer to the same species, so care instructions for Wood's Cycad apply identically to anything sold as Wood's Encephalartos.

How much light does wood's cycad need?

Wood's Cycad grows best in bright indirect light (just back from a sunny window). Give it the brightest spot you have, ideally a few hours of direct sun through a south or west window. In low light, fronds stretch and weaken and new flushes stall.

How often should I water wood's cycad?

Water wood's cycad when the top 5 cm of mix is dry, roughly every 10-14 days in growth. Water deeply, then let the mix dry well before the next drink. The swollen caudex stores water, so it tolerates drought far better than sogginess. Cut back sharply in winter. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is wood's cycad toxic to cats and dogs?

Wood's Cycad is toxic to pets. Toxic to cats and dogs. All cycads (order Cycadales, including Encephalartos) contain cycasin, mirroring the ASPCA's classification of the sago palm (Cycas) as toxic. Ingestion causes vomiting, diarrhoea, severe liver failure and neurological signs; seeds are the most poisonous part. Treat any ingestion as a veterinary emergency.

What USDA hardiness zone does wood's cycad grow in?

Wood's Cycad is rated for USDA zone 9-11 (indoor or conservatory in most US homes) and RHS hardiness H2. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Wood's Cycad deep-dive guides

Every aspect of wood's cycad care, each with its own calibrated guide:

Featured in these plant shortlists

Wood's Cycad qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Wood's Cycad is also commonly called Wood's Encephalartos.