Cacti
Cacti: strong houseplants for sunny spots
Cacti are strong, low-maintenance houseplants for bright windowsills, desks and sunny spots indoors. They store water in their stems and therefore need much less water than most houseplants. Water only when the potting mix has dried out completely and use a loose, well-draining substrate where possible.
Because of their spines, cacti are less suitable for places where cats, dogs or children can easily touch them.
Want to know more about watering, light, repotting and soft or discoloured cacti? Read our cacti care guide.
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Cacti — FAQ
Which cactus suits my spot: a sunny windowsill, a balcony or a corner of the living room?
Choose by light and available space: for a very bright south or west windowsill pick compact, sun-loving forms; for a bright but less intense window or shaded balcony edge choose slower-growing, shade-tolerant types; for floor space or a dramatic focal point choose taller, columnar specimens. If space is tight, choose small, slow-growing plants that stay compact in small pots.
What are the main growth forms and how do they change care and placement?
Compare the common forms: globular/ball-shaped types stay small and suit windowsills; columnar or tree-like types need more floor area and stable pots; crested or coral-shaped specimens are decorative and prefer stable light and careful handling; hanging or trailing types work best in baskets or on shelves. Each form differs in watering rhythm and root volume—match pot size and watering to the plant's shape.
How should I water, pot and overwinter cacti to avoid common problems?
Use a very free-draining cactus mix, a pot with drainage and a size only slightly larger than the rootball. Water deeply but infrequently: let the substrate dry out completely between waterings; reduce watering strongly in winter. Repot every few years into fresh, draining soil. Avoid overwatering and poor drainage to prevent root rot. Wear gloves or use tools when handling spiny plants and beware that some cactus-like succulents exude irritating sap when cut.
How can I arrange cacti for the best visual effect without creating care problems?
Group cacti with similar light and watering needs together. Mix heights, shapes and textures for contrast—use odd-number groupings and clear pots or contrasting ceramics for emphasis. Avoid overcrowding: good air circulation and separate pots make watering and pest checks easier. Use gravel top-dressing for a finished look, but remember it does not replace correct soil and drainage.