A sturdy trunk, a tuft of leaves with soft tips: the spineless yucca looks like a palm but isn't one. It loves light and forgives a forgotten watering.

What it does for you

Unlike most yuccas, this one has no sharp spines at the leaf tips¹. It's a popular, low-maintenance houseplant¹. Gardeners' World calls it a great plant for beginners: easy, tolerant of neglect and able to cope with some direct sunshine².

Origin & history

It grows wild from central Mexico to Panama, as a tree, mainly in the seasonally dry tropics³. Outdoors it reaches 8–12 metres⁴ – it's the tallest of the yuccas⁵. It was introduced into Florida in 1956 as a substitute for the spiny Spanish bayonet⁵.

Its former name Yucca elephantipes refers to the thick trunk that resembles an elephant's foot¹; today's accepted name is Yucca gigantea³. The genus name comes from a name for cassava (yuca), which isn't closely related⁶. NC State also calls it giant or soft-tip yucca¹, GRIN giant yucca⁷, Gardeners' World yucca cane².

Caution

The ASPCA lists yuccas as toxic to cats and dogs: they contain saponins, the main sign is vomiting⁸. NC State rates the poison severity as low; eaten, the leaves and roots can cause nausea, vomiting, diarrhoea, headaches and dizziness in people¹. For pets we use the more cautious rating. The RHS lists it as a skin allergen and advises gloves⁴; NC State says the sap can cause minor rashes¹.

Care

Light. Yuccas need a sunny spot all year, with light shade from direct summer sun. Too little light can make the leaves sag. Turn it regularly, or it grows lopsided towards the light⁹. From late spring to late summer it can stand outside in a sheltered spot, as long as it is stable in the wind⁹.

Water. Water when the top few centimetres of compost are dry, and let surplus water drain away; water more sparingly in winter² – as a rule of thumb every 1–2 weeks in summer. Overwatering is the bigger danger²: it can cause root rot¹.

Temperature & humidity. Normal indoor temperatures and humidity suit it; keep it away from cold draughts and sudden temperature changes¹. No need to mist². The minimum varies: the RHS names 10 °C for houseplants, and 7 °C at night during the winter rest⁹; NC State says to bring it in below 50 °F (10 °C)¹ – to be safe, keep it above 10 °C.

Soil, pot & repotting. Loam-based compost (John Innes No 2) with 20–30 % extra grit⁹, or one part potting mix to three parts perlite or sand¹. It does well slightly pot-bound: repot every two or three years in spring; for big plants, replace the top compost instead. A sturdy pot keeps it from toppling².

Feeding. The sources differ: fortnightly from spring to early autumn⁹, monthly⁴, or every couple of months at half strength². We go with monthly; none in winter⁹.

Extras

Houseplants rarely flower¹. Outdoors, mature plants carry spikes up to 1 m long with creamy-white, hanging flowers⁴. The flowers are edible and can be used in salads⁵.