Succulents and Cactus

Cacti and succulents are drought-tolerant, low-maintenance plants that store water in their leaves, stems, or roots. While all cacti are succulents, not all succulents are cacti; true cacti are distinguished by “areoles” (small, fluffy, cushion-like bumps) from which spines, hair, or flowers grow. They thrive in bright light and well-draining soil. 

Defined by the presence of areoles, cacti typically have spines instead of leaves, and mostly native to the Americas (Golden Barrel Cactus or Silver Torch Cactus, for example).

Succulents are a broader category, including plants with fleshy leaves or stems designed to store water (Aloe Vera, Echeveria, Haworthia or Sedum, for example).

Both need bright light (or partial shade for some succulents), fast-draining potting mix (sand/perlite), and to be watered only when the soil is completely dry. You’ll need to use a specifically formulated cactus and succulent potting mix to prevent root rot.

It’s best to drastically reduce watering during autumn and winter rest periods and ensure ample, bright light, but avoid scorching, direct afternoon sun for some species.

View Our Full Range of Succulents and Cactus

Our team can advise on managing succulents and cacti by providing at least 4–6 hours of bright, direct sunlight daily, using fast-draining soil (potting mix with sand or pumice), and watering only when the soil is completely dry. Key care includes using pots with drainage holes, reducing water in winter, and rotating plants to prevent lopsided growth. 

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Succulents and Cactus

Did You Know?

Succulents and cacti are hardy growers in our varied climate. Here are a few tips for Melbourne conditions:

  • Succulents and cacti require only modest amounts of water and fertiliser, but do need abundant light. Most cacti and succulents grow in well-drained sandy soil. They are well adapted to living in houses where the relative humidity is low.
  • If the soil is too moist, your cactus can develop rot. This is a common error cactus gardeners make when starting out. If in doubt, stay on the side of under-watering.
  • For cacti, use a pot just large enough to fit the plant. For other succulents, use a pot just slightly larger than the root ball. For some plants, the holes in the bottom of the pot do not provide enough drainage.

From Our Garden Guide

Succulents and Cactus

Key Management Tips:

Temperature & Care: Keep in temperatures between 10°C–35°C, protecting them from frost. Gently remove dead foliage to prevent pests.

Light: Provide bright light, preferably 4–6 hours of direct sun. Inadequate light causes stretching (etiolation), while too much hot, direct afternoon sun can burn some varieties.

Watering: Water deeply, then allow the soil to dry out completely. Generally, this means watering once a week in summer and every 2–4 weeks in winter, depending on your climate.

Soil: Use a specialised, well-draining potting mix (ask Diaco’s staff for advice on this). Incorporate pumice, perlite, or grit to improve drainage.

Containers: Always use pots with drainage holes to prevent root rot.

Visit our Garden Guide for more tips on growing succulents and cacti in Melbourne.