How to Grow Chaya: A Perennial Spinach Alternative for Australia

Let’s talk about how to grow chaya. Chaya (Cnidoscolus aconitifolius), sometimes called tree spinach, is a perennial leafy green that thrives in heat and humidity, making it one of the best spinach alternatives for Queensland and other warm climates.

It’s incredibly easy to grow and really isn’t talked about enough. It’s also much harder to buy/find than it should be. I actually got lucky with this one and bought some cuttings off eBay. They arrived as basically just sticks. I think I bought five, and all five of them grew amazingly well. Once you get one plant going, you’re really not going to run out.

What Chaya Is (Tree Spinach) and How It Grows

Chaya is often called tree spinach. The botanical name is Cnidoscolus aconitifolius. It’s a perennial shrub, not an annual like spinach, which means once you plant it, you can keep harvesting year after year without replanting.

It grows more like a small bush than a vegetable, and it gets bigger than you might expect. Mine shot up to around two metres within the first year. It has woody stems and large, soft green leaves, and it puts on a lot of growth very quickly.

Because it’s perennial and woody, it responds really well to pruning (#ad). You can cut it back hard and it will regrow fast.

The Best Climate for Growing Chaya

Chaya is native to Mexico and Central America, which makes it perfectly suited to Queensland and other warm climates.

It loves heat and humidity and really struggles in frost. It’s ideal for tropical and subtropical gardens. You can grow it in warm temperate areas, but you’ll need to protect it when it gets cold. Growing it in a pot can help, so you can move it to a warmer spot near a wall, in a sunroom, or into a greenhouse if needed.

Once established, it handles heat extremely well. I’ve seen taro struggle in dry conditions where chaya keeps going without an issue.

Sun, Shade, and the Best Position for Chaya

Chaya grows well in full sun and part shade. I’ve got plants in both positions and they all grow well.

In part shade, the leaves tend to be a bit softer, which you might prefer for harvesting. It does need space, though. This isn’t a small plant, but it works really well as an edible hedge along fences, on the edges of a food forest, or as a background plant in the garden. Not so much a crop you'd plant in your raised veggie beds because it does get quite big!

It’s also a lush-looking tropical plant, so it earns its keep visually as well.

Soil and Water Requirements for Chaya

Chaya isn’t fussy about soil at all. I’ve got it growing in almost sand, in clay, and in really good garden soil, and all of them are doing well. One grows a bit faster than the others, but they’re all healthy.

It handles poor soil surprisingly well. When you’re establishing plants, especially from cuttings, it does need regular water while it’s forming roots. Once it’s established, you can pretty much stop worrying about it.

How to Propagate Chaya from Cuttings

Chaya is usually grown from cuttings, and honestly, there’s no reason to do it any other way.

Take a thick stem cutting with at least three nodes, push it straight into the soil, and keep it moist while it establishes. Cuttings can be quite large. You don’t need to baby them.

I prefer planting cuttings straight into their final garden position because they’re so easy to strike. You can grow them in pots too, of course, or give them a nice, big grow bag. Some varieties don’t set viable seed (#ad) anyway, so cuttings are the normal way chaya is grown.

Harvesting and Managing Chaya Growth

You can harvest young to semi-aged leaves. Older leaves are tougher but still usable. I definitely prefer the younger leaves.

Regular harvesting helps keep the plant bushy, but you can also just prune (#ad) it. I often cut it back and either throw it in the chook pen or leave it on the ground as living mulch (affiliate link). Just be aware that if you chop (#ad) and drop, those stems can reshoot if conditions are right.

That’s not really a problem, though, because it’s such a useful plant to have. Unless you're short on space – in that case, you might want to keep an eye on re-sprouting stems.

Some varieties can have mild stinging hairs on young growth, so gloves can help when harvesting early leaves if that bothers you.

Chaya Insects and problems

I haven't noticed many problems growing chaya in Queensland at all. It does seem to attract green ants, which can be a bit of nuisance when it comes to harvesting. They love rolling the leaves up and making their nests in there.

You might also find some grasshoppers loving the leaves, but overall, it seems insects mostly leave it alone. I've had other critters take a nibble on the leaves, too. This usually happens overnight, so I'm not sure who the culprit is, exactly. None of this bothers the chaya though, so I don't worry about it. The horses seem to leave it alone, but cattle love the foliage and stems.

Chaya Nutrition and Traditional Uses

Chaya is often called a superfood because the leaves are very high in protein for a leafy green and rich in calcium, iron, and vitamins A, B, and C.

In traditional cultures, it’s been valued as a strength and health food rather than just a vegetable. It’s been used as a daily food, especially for people recovering from illness, and in folk traditions it’s associated with circulation, digestion, and general wellbeing.

In some places it’s treated more like a tonic plant than the main vegetable. It's similar to sambung (longevity spinach) in that way.

How to Cook and Eat Chaya Safely

Once cooked (see note below on safety), chaya has a mild flavour, somewhere between spinach and kale. It’s not bitter or strong. You barely notice it’s there. Chaya must be cooked before you eat it.

You can use it anywhere you’d use spinach, like soups, stews, curries, and stir-fries. It makes an excellent spinach substitute for hot climates where spinach just doesn’t grow very well unless it's winter.

In some regions, people avoid cooking chaya in aluminium pots because of reactions during boiling. It’s not dangerous, but it’s often mentioned in traditional guidance.

Important Note: Always Cook Chaya

I just wanted to mention this again: Chaya must never be eaten raw.

The raw leaves contain cyanogenic compounds. Cooking destroys these toxins, which is why chaya is always cooked in traditional use. Boil the leaves for at least 15-20 minutes or cook them thoroughly in soups, stews, curries, or stir-fries.

This is similar to how plants like taro or cassava are treated. Once cooked properly, chaya is completely safe and widely eaten.

Why I Think Chaya Is Worth Growing

Chaya is:

• perennial, so no constant replanting
• very productive
• suited to heat and humidity
• low maintenance
• genuinely nutritious

Once it’s established, the harvest is basically endless. For hot climates, it fills a gap that very few leafy greens can. That’s why I’d absolutely recommend growing chaya if you’ve got the space for it.