What aloe vera actually looks like
- Habit — a stemless rosette of leaves growing directly from the ground. It does not form a trunk.
- Leaf size — 40 to 60cm long, thick and fleshy, tapering to a point.
- Leaf colour — a dull grey-green, often with a slight blue or glaucous cast.
- Leaf surface — smooth and waxy, with pale spots on young leaves that fade as the plant ages.
- Leaf edges — soft white teeth along both sides. They look sharp but they do not cut.
- Leaf shape — upright and slightly channel-shaped, with a concave upper surface.
The gel inside is the confirmation
Cut a leaf across and aloe vera shows two clearly different materials. Just under the skin is a thin layer of yellow latex, and filling the centre is a clear, odourless, slightly viscous gel.
That clear gel is the part the plant is grown for. Any aloe-like plant that produces a cloudy, coloured or strongly scented gel is a different species.
Aloe vera and its lookalikes
| Plant | Habit | Leaf | Flowers | Separator |
|---|---|---|---|---|
| Aloe vera | Stemless single rosette | Thick, grey-green, soft teeth, spots when young | Rare, yellow on a tall spike | Stemless rosette plus clear gel |
| Aloe arborescens | Many rosettes on a branching shrub | Narrower, greener, curved | Bright orange-red, winter | Shrub habit and orange flowers |
| Aloe ferox | Single tall trunk to 3m | Very thick, with reddish-brown spines | Orange, on a tall spike | Obvious trunk and heavy spines |
| Agave | Rosette, often large | Stiff, fibrous, hard terminal spine | Once only, then the plant dies | Hard sharp terminal spine |
| Haworthia | Small tight rosette | Small, with white raised bands | Tiny white flowers | Much smaller with white banding |
| Gasteria | Small rosette | Distichous, tongue-shaped, warty | Small pink-orange | Leaves stacked in two rows |
Why aloe vera so rarely flowers
Aloe vera is a cultivated plant that has been propagated from cuttings for thousands of years and it almost never sets viable seed. Because it is grown from offsets rather than seed, the flowering habit has been largely lost.
When it does flower, the flowers are yellow and carried on a tall spike well above the leaves. If your plant is flowering orange or red, it is almost certainly Aloe arborescens rather than aloe vera.
Safety: the latex, not the gel
- The clear inner gel is the part used on skin and in drinks. It is soothing and mild.
- The yellow latex just under the skin, called aloin, is a powerful laxative and a skin irritant. Rinse it off thoroughly before using the gel.
- Never eat an ornamental aloe or a plant you have not positively identified, because some aloe species are toxic.
- Do not apply aloe to broken skin or a serious burn. It is a mild soother, not a treatment.
- Keep the plant away from pets, as aloe is toxic to cats and dogs if eaten.
Aloe vera is one of the most widely grown plants in the world and one of the most frequently mislabelled. Garden centres sell agaves, other aloe species and even haworthias under the aloe vera name, and the plants look similar enough that the mistake survives for years.
The good news is that true aloe vera has a specific set of features that separate it from the whole group, and the most useful one is the gel inside the leaf.
Frequently Asked Questions
Look for a stemless rosette of thick, grey-green leaves 40 to 60cm long with soft white teeth along the edges and pale spots on young leaves. Cut a leaf and the centre should be clear, odourless gel.