XGasteraloe
×Gasteraloe is the nothogenus covering intergeneric hybrids between Gasteria and Aloe, two closely related genera in the family Asphodelaceae. These crosses inherit the best of both parents — the bold, tongue-like leaves and pearly spotting of gasteria combined with the tidy rosette form and toughness of aloe — producing vigorous, forgiving plants that are among the easiest of all succulents to grow indoors.
Because both parent genera are so compatible, ×Gasteraloe hybrids are numerous and often unnamed, passed around collections simply as "gasteraloe." Many are compact, slowly clustering plants with thick, dark green leaves marked by raised white tubercles or bands. They tend to be more heat- and light-tolerant than pure Gasteria and more shade-tolerant than pure Aloe, which makes them exceptionally adaptable windowsill plants.
Common crosses
The parentage of any given ×Gasteraloe can be hard to pin down, since growers have crossed many species and re-crossed the offspring over the years. In general the hybrids blend features of the two parents to varying degrees:
- Plants leaning toward the Gasteria side tend to have flatter, strap-shaped, heavily spotted leaves arranged in loose rosettes or two-ranked (distichous) fans.
- Plants leaning toward the Aloe side form neater, more upright rosettes with firmer, sometimes lightly toothed leaves.
A number of these crosses have been given cultivar names and are grown as distinctive foliage plants; because named clones can be unstable or confused in the trade, it is best to grow them for their appearance rather than to rely on a precise pedigree.
Description
×Gasteraloe hybrids are small to medium rosette succulents, typically forming clumps as offsets accumulate around the base. The leaves are usually thick and fleshy, triangular to tongue-shaped, and coloured deep green — often overlaid with the raised pale spots, warty tubercles, or crossbanding that gasteria contributes. Leaf margins may be smooth or bear small soft teeth depending on the aloe parentage.
Mature plants can send up slender flower spikes bearing tubular flowers in shades of pink, coral, or orange, showing the influence of both parents. As with many succulent hybrids, flowering is a bonus rather than the main attraction; these plants are grown chiefly for their sculptural, easy-care foliage.
Cultivation
×Gasteraloe hybrids are famously undemanding and a good choice for beginners. Care follows the same principles as for the parent genera Gasteria and Aloe:
- Light — bright, indirect light suits them best. They tolerate more sun than pure gasteria and more shade than pure aloe, but strong midday sun can scorch the leaves, so give some protection through the hottest hours.
- Water — water thoroughly, then let the mix dry out completely before watering again. Reduce watering sharply in winter. Overwatering and soggy soil are the main causes of loss (see Watering).
- Soil — a free-draining, gritty succulent mix in a pot with drainage holes.
- Temperature — keep above freezing; they are happiest in warm, frost-free conditions and appreciate a cooler, drier winter rest.
They are slow, steady growers and do not need frequent repotting; move them up a pot size only when the clump has filled its container.
Propagation
The easiest and most reliable method is by offsets (pups), which most ×Gasteraloe hybrids produce freely around the base. Separate a rooted offset, let any cut surface callus for a day or two, and pot it into a gritty mix. Many hybrids can also be raised from leaf cuttings, though this is slower and less certain. Seed is rarely used, since hybrid seedlings do not come true to the parent plant.
Common problems
- Rot — the usual result of overwatering or a poorly draining mix; the base or lower leaves soften and discolour.
- Etiolation — too little light causes the rosette to stretch and lose its compact form and markings.
- Pests — mealybugs (white cottony tufts in the leaf axils) and, less often, scale insects; see Pests and diseases.
See also
- Gasteria — one parent genus
- Aloe — the other parent genus
- Propagation - offsets · Soil and potting mix · Watering · Repotting