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Aloe vera

Forest & Kim Starr / Wikimedia Commons - CC BY 3.0

Aloe vera

Aloe vera is a succulent perennial grown almost everywhere as an easy houseplant: a low rosette of thick, fleshy, toothed, grey-green leaves filled with the clear gel it is famous for. POWO (Kew) gives its native range as the Arabian Peninsula, though the exact wild origin is uncertain after millennia of cultivation, and it is now grown worldwide as the familiar medicinal aloe. Indoors it wants bright light or a sunny windowsill and very infrequent watering - it is highly drought-tolerant and rots if overwatered, which is the single most common way to kill it. Its uses are genuinely nuanced: the clear inner leaf gel is widely applied to skin (minor burns) and is consumed in aloe juices and drinks, but the yellow latex just beneath the rind is a powerful laxative and irritant that should not be casually eaten (and is best avoided in pregnancy), and the whole plant is toxic to cats and dogs. It is frost-tender and hardy outdoors only in roughly USDA zones 9b-11; everywhere colder it lives in a pot. RHS gives it the Award of Garden Merit as an easy succulent houseplant and rates it H1C. Its air-purifying reputation, drawn from a single 1989 NASA chamber study, is negligible at realistic room densities - grow it for the plant itself, not to clean your air.

Climate fit: narrow (17/100)

Container

Structure

Light

Full sun / Part sun

Water

Low water

Mature size

12-24" tall · 18" apart

Hardy in zones

9b-11

frosty to nearly frost-free winters

Native in Illinois

No

Edible only with careful preparation, and the distinction is load-bearing: the clear inner leaf gel is widely applied to skin for minor burns and is consumed in aloe juices and drinks, but the yellow latex just beneath the green rind is a powerful laxative and irritant that should not be casually eaten and is best avoided in pregnancy.

°C

°F

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.

Now

Zone 6b

Plotwright

USDA Zone 6b

-5°F to 0°F

Won't grow here

2050

2100

Zone 7a

Plotwright

0°F to 5°F

Won't grow here

In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.

✕

Out of range today and still out of range in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.

Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 2 ecoregions - 2 climate-resilient through 2070. Best matches first.

California coastal sage and chaparral

›

Fynbos shrubland

›

What it needs

Conditions

Light

Full sun / Part sun

Water

Low water

Spacing

18"

Habit

A succulent perennial houseplant forming a low rosette of thick, fleshy, gel-filled, toothed grey-green leaves - the familiar medicinal aloe. Grown in a pot in free-draining mix on a bright windowsill, it stays compact and slow-growing, offsetting into clumps of small 'pups' around the parent. It wants bright light or sun and very infrequent watering: it is highly drought-tolerant and rots if overwatered, so the usual cause of decline is too much water, not too little. Its uses are genuinely nuanced and worth getting right: the clear inner leaf gel is widely applied to skin for minor burns and is consumed in aloe juices, but the yellow latex just beneath the rind is a powerful laxative and irritant that should not be casually eaten (and is best avoided in pregnancy), and the whole plant is toxic to cats and dogs. Treat it as edible only with preparation - the prepared inner gel alone, latex and green rind removed - and keep the plant away from pets.

Care tips

•

Water only when the mix has dried out almost completely, and always use a pot with drainage holes - this plant is far more forgiving of neglect than of overwatering, and soggy soil rots the roots and crown.

•

Give it the brightest light you have, ideally a sunny windowsill; in dim light the leaves grow soft, pale, and stretched instead of plump and firm.

•

Pot it in a free-draining succulent or cactus mix and resist over-potting - too large a container stays wet and invites rot. Move up only one size at a time.

Lifecycle

Planting

Pot in a free-draining succulent or cactus mix in a container with drainage holes, and set it in bright light or a sunny windowsill. Outdoors it can only go in the ground in frost-free climates of roughly USDA zones 9b-11; everywhere colder it is grown strictly as a potted houseplant.

Transplanting

Repot every couple of years in spring, or when offsets crowd the pot, moving up just one container size into fresh free-draining mix - too large a pot holds moisture and invites rot. Move any outdoor plants under cover well before frost.

Early growth

Let the mix dry out almost completely between waterings - this plant is far more forgiving of neglect than of overwatering, and soggy soil rots the roots and crown. Give it the brightest light you have so the rosette stays compact and firm instead of soft and etiolated.

Maturity

As a houseplant it remains a slow-growing, clumping rosette, sending up small 'pups' that can be separated and potted on. It rarely flowers indoors; given a sunny spot and infrequent water it asks for very little beyond an occasional repot and the removal of crowded offsets.

Propagation

Easiest from offsets: lift the small pups that form around the base, let any cut surface callus for a day or two, then pot them up in free-draining mix and water sparingly until rooted. It can also be grown from seed, but division of pups is far quicker and keeps the plant true.

Plant this, not that

Better fit for this place

For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.

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Bergenia cordifolia (often treated by botanists as a synonym within B. crassifolia) is a tough, evergreen perennial native to the Altai Mountains, southern Siberia and Mongolia, grown for its bold, heart-shaped leathery leaves that flush red-bronze through winter and its deep pink flower spikes in early-to-mid spring. It is one of the most tolerant groundcovers in cultivation - enduring deep shade, poor soil, drought, and hard continental cold (commonly rated to USDA Zone 3 in US horticulture; RHS rates it H7, hardy below -4°F). The honest catch is its shallowly creeping rhizomes: in mild, moist climates they can colonise well beyond the intended planting, and the large, persistent leaves trap fallen debris and are notoriously attractive to slugs and vine weevils.

Perennial

Full sun / Part sun / Part shade

Better fit now and in 2050

Now: well-suited

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Liriope muscari

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Better fit now and in 2050

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Perennial

Part sun / Part shade

Better fit now and in 2050

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Buxus microphylla

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Shrub

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Better fit now and in 2050

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Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.

Bergenia cordifolia

Elephant's ears

Bergenia cordifolia (often treated by botanists as a synonym within B. crassifolia) is a tough, evergreen perennial native to the Altai Mountains, southern Siberia and Mongolia, grown for its bold, heart-shaped leathery leaves that flush red-bronze through winter and its deep pink flower spikes in early-to-mid spring. It is one of the most tolerant groundcovers in cultivation - enduring deep shade, poor soil, drought, and hard continental cold (commonly rated to USDA Zone 3 in US horticulture; RHS rates it H7, hardy below -4°F). The honest catch is its shallowly creeping rhizomes: in mild, moist climates they can colonise well beyond the intended planting, and the large, persistent leaves trap fallen debris and are notoriously attractive to slugs and vine weevils.

Perennial

Full sun / Part sun / Part shade

Liriope muscari is an evergreen, grass-like perennial native to the shady forest understories of China, Japan, and Korea, where it grows at elevations of 330 to 4,600 feet. In gardens it forms dense, weed-suppressing clumps of arching dark-green foliage topped by spikes of lilac-purple flowers in late summer, followed by ornamental black berries - earning it the RHS Award of Garden Merit. It is drought-tolerant and remarkably adaptable, but the honest catch is its behaviour outside its native range: in parts of the eastern United States it is a documented invasive species, spreading by rhizomes and self-seeding into natural areas, and it provides minimal wildlife value compared with native groundcover alternatives.

Perennial

Full sun / Part sun / Part shade

Kalanchoe tomentosa is a slow-growing, evergreen succulent subshrub endemic to the rocky granite outcrops of east-central Madagascar, where it tolerates seasonal drought in arid and semi-arid scrubland. In gardens it excels as a tactile, silver-felted container or houseplant prized entirely for its velvety, brown-tipped foliage; it rarely flowers in cultivation. The honest catch is toxicity: the plant is toxic to cats and dogs and mildly toxic to humans, so it must be kept out of reach of pets and children - making it a poor choice for households with either.

Aloe maculata (soap aloe, also called zebra aloe; long sold as Aloe saponaria) is a clumping, stemless succulent from southern Africa with broad, triangular leaves marked by distinctive "H-shaped" pale spots. It is grown for its flat-topped racemes of tubular flowers in shades of orange-red to coral and yellow, held on tall branched stalks that draw sunbirds, bees, and other insects. A tough, drought- and salt-tolerant groundcover that spreads by suckers, it suits rock gardens, dry borders, coastal plantings, and containers in warm climates. It is frost-tender: the RHS rates it H1C (roughly USDA 9b-11), so leaves are damaged below freezing and it needs protection or indoor wintering where frosts occur. The leaf gel is used traditionally for skin and other ailments, but the plant is recorded as harmful if eaten (handle with care; seeds are reputedly poisonous), so treat it as not for casual consumption around people and pets.

Mondo grass is a stoloniferous, evergreen perennial in the Asparagaceae (not a true grass despite its grass-like leaves), native to China, Japan, India, Nepal, and Vietnam, grown as a fine-textured, low groundcover that forms a dense, weed-suppressing turf of dark green foliage. It tolerates deep shade and dry spells once established, making it popular for difficult spots under trees and along pathways. The honest catch is its aggressive spread by underground stolons - in warm zones (8-10) it readily colonises beyond its intended boundary and needs hard edging - and its attractive metallic-blue berries contain steroidal saponins that are mildly toxic if eaten.

Perennial

Part sun / Part shade

Gasteria bicolor is a slow-growing, tongue-leaved succulent native to the Eastern Cape of South Africa, where it grows on rocky slopes and outcrops in thicket vegetation around Port Elizabeth (a summer-rainfall region). Its mottled, strap-shaped leaves and arching racemes of curved, stomach-shaped pink-to-orange flowers make it a forgiving container plant for warm, frost-free settings, and it tolerates light shade better than most succulents - a useful trait for brighter indoor positions. The honest catch is its tenderness: it is damaged below about 41°F and cannot survive frost, so gardeners outside USDA zones 9b-11 must overwinter it indoors. It is a container-and-houseplant plant, not a garden perennial in most of the world.

Perennial

Part sun / Part shade

Educator packet

Plant packet

Aloe vera educator packet

Aloe vera is a succulent perennial grown almost everywhere as an easy houseplant: a low rosette of thick, fleshy, toothed, grey-green leaves filled with the clear gel it is famous for. POWO (Kew) gives its native range as the Arabian Peninsula, though the exact wild origin is uncertain after millennia of cultivation, and it is now grown worldwide as the familiar medicinal aloe. Indoors it wants bright light or a sunny windowsill and very infrequent watering - it is highly drought-tolerant and rots if overwatered, which is the single most common way to kill it. Its uses are genuinely nuanced: the clear inner leaf gel is widely applied to skin (minor burns) and is consumed in aloe juices and drinks, but the yellow latex just beneath the rind is a powerful laxative and irritant that should not be casually eaten (and is best avoided in pregnancy), and the whole plant is toxic to cats and dogs. It is frost-tender and hardy outdoors only in roughly USDA zones 9b-11; everywhere colder it lives in a pot. RHS gives it the Award of Garden Merit as an easy succulent houseplant and rates it H1C. Its air-purifying reputation, drawn from a single 1989 NASA chamber study, is negligible at realistic room densities - grow it for the plant itself, not to clean your air.

Scientific name

Aloe vera

Plant type

perennial

Hardiness

9b-11

Light

full-sun, part-sun

Moisture

low

Spacing

18 inches