Succulents and Cacti – Complete Care Guide

Succulents and cacti rank among the most beloved houseplants – and for good reasons. They boast diverse shapes, visual appeal, and thanks to their natural water reserves, easily survive prolonged absences of their caretaker. Nevertheless, numerous half-truths and oversimplifications circulate around their cultivation. This guide provides everything essential: from selecting the right substrate through watering regimes to propagation and winter care.

A complete selection can be found in our categories of succulents and cacti.

What Are Succulents, Really?

The word "succulent" derives from the Latin succulentus – juicy. These are plants that store water in thickened leaves, stems, or roots. This adaptation allows them to survive in environments with irregular or scarce rainfall – from desert plains to rocky coastal cliffs.

A fundamental distinction: all cacti are succulents, but not all succulents are cacti. Cacti (family Cactaceae) are distinguished by the presence of areoles – specialized budding structures from which spines, hairs, and flowers emerge. No other plant family possesses this anatomical peculiarity.

Among succulents are hundreds of genera from diverse families – from the jade plants (Crassulaceae) through spurges (Euphorbiaceae) to the aloe family (Asphodelaceae). This taxonomic diversity is reflected in a wide spectrum of cultivation requirements.

Most Popular Succulent Genera

Echeveria

Rosette-forming succulents with fleshy leaves in a broad color palette – from blue-green through salmon to deep violet. Most species remain compact (5–15 cm), making them perfect for windowsills, compositions, and hanging pots. In our succulents selection you will find various cultivars and less common species.

Care: Full sun (minimum 6 hours daily), watering once every 10–14 days in summer, nearly dry in winter. Echeveria are very sensitive to water pooling in the rosette – water exclusively under the leaves or via bottom watering.

Haworthia

Small rosette-forming succulents with characteristic translucent "windows" on leaves, which in their natural habitat capture light below the soil surface. They are ideal for beginners because, unlike most succulents, they tolerate lower light levels.

Care: Bright indirect light – direct midday sun causes leaf scorch. Watering once every 10–14 days. An excellent choice for north and east-facing windows, office environments, or partially shaded windowsills.

Sedum

An extraordinarily diverse genus comprising hundreds of species – from tiny ground-cover forms (S. album, S. acre) to upright garden perennials (S. spectabile). Indoor species such as S. morganianum (burro's tail) are prized for their cascading habit, ideal for hanging baskets. Outdoor species are frost-hardy in Czech conditions and suit rock gardens, green roofs, and dry stone walls.

Care: Full sun, very restrained watering, well-draining substrate.

Crassula

A genus with over 200 species in various shapes and sizes. The best known is Crassula ovata (money tree or jade plant), though C. perforata with leaves threaded through the stem and miniature C. muscosa with delicate scaly structure are horticulturally interesting. Crassulas are among the most resilient succulents available.

Care: Bright light with several hours of direct sun, watering once every 2–3 weeks. Easy to propagate from stem and leaf cuttings.

Aloe

Medicinal succulents with fleshy leaves filled with gelatinous pulp. Aloe vera is undoubtedly the best known representative, though Aloe aristata (stemless aloe, tolerates lower temperatures) and Aloe variegata with striking striped leaf patterns are horticulturally interesting.

Care: Bright to direct light, watering once every 2–3 weeks. Excellent for beginners – they respond quickly to overwatering, but forgive it readily.

Sempervivum

"Ever-living" rosettes with extraordinary hardiness – they overwinter without difficulty in Czech climate without any protection. Ideal for outdoor rock gardens, roof gardens, and stone walls. They naturally produce offsets and will gradually cover an entire area densely.

Care: Full sun, minimal watering, well-draining substrate. Fully frost-hardy; winter waterlogging is more dangerous than frost.

Cacti – Basic Overview

Cacti form a fascinating group of succulents with enormous formal diversity – from small spherical mamillarias to robust columnar cereuses and epiphytic Christmas cacti with flattened stems. The basic distinction between desert and epiphytic cacti is essential for cultivation, as each group has different requirements for watering, light, and temperature. In our cacti category you will find species suitable for both beginners and advanced collectors.

Popular genera for beginners:

• Mammillaria – spherical cacti with warty protrusions instead of ribs; very willing to flower even in room conditions
• Echinopsis – round to short cylindrical cacti with spectacular, often fragrant flowers; individual flowers last 1–2 days, but plants flower repeatedly
• Gymnocalycium – flat cacti with large flowers; tolerate less light than most cacti
• Opuntia – flat-jointed cacti, some species are frost-hardy and suit outdoor cactus beds
• Schlumbergera – Christmas cactus is an epiphyte from Brazilian rainforests; requires entirely different care from desert species

Light

Light is the most important cultivation factor for succulents and cacti – more important than watering. Most species originate from sunny locations and require minimum 6 hours of direct or very bright light daily. Insufficient light cannot be compensated by any other optimal care.

Signs of insufficient light:

• Etiolation – abnormal stem stretching toward the light source
• Paling or greening of colored leaves (loss of anthocyanin coloration)
• Sparse, distant arrangement of leaves in rosette-forming species
• Weak, leaning, or unstable growth

Recommendations by window orientation:

In winter, when days are very short and light weak in the Czech Republic, consider supplementary lighting. Cacti, which need sufficient light to form flower buds, are especially sensitive to this. Suitable are LED fixtures with full spectrum, positioned 15–30 cm above plants for 12–14 hours daily.

Watering

Watering is the most frequent cause of problems in succulent and cactus cultivation. The basic rule is simple: less is more – but proper watering technique is equally important as its frequency.

How to water correctly:

1. Wait until the substrate is completely dry – check with a finger or wooden stick 2–3 cm deep
2. Water thoroughly – water should drain through the drainage hole; surface watering is insufficient
3. Empty excess water from the saucer after 15–30 minutes
4. Never leave the plant standing in water – roots without air access quickly rot

Indicative watering frequency:

Frequency also depends on temperature, pot size, substrate type, and the individual plant – the table serves as a starting guide, not a rule.

Watering tips:

• Use settled or filtered water at room temperature – cold tap water can shock roots
• Water in the morning so excess moisture can evaporate during the day
• Never spray or pour water into the center of a rosette of rosette-forming succulents – pooled water causes rapid heart rot
• When in doubt, err on the side of underwatering – underwatering is easier to remedy than overwatering

Substrate

The correct substrate is as essential to success with cacti and succulents as correct watering. The key property is singular: drainage. Water must drain quickly and the substrate must dry out easily and completely between waterings.

Ideal substrate composition:

• 50% quality universal substrate (without excessive peat content)
• 25% perlite or pumice (ensure aeration and drainage)
• 25% coarse silica sand or fine gravel, 2–4 mm fraction

Commercial cactus substrates:

Ready-made mixes are convenient, but most remain somewhat too heavy and moisture-retentive. We recommend always improving them with perlite addition in a 1:1 ratio. The substrate should not form a cohesive ball when squeezed – after compression it should crumble immediately.

What the substrate must not be:

• Moisture-retentive or insufficiently water-draining
• Containing fine peat fractions that form impermeable crusts when dry
• Entirely nutrient-free – a small organic component is desirable for healthy growth

Repotting – Step by Step

When to repot:

• In spring (March–May), at the beginning of the growing season when plants awaken
• When roots visibly overgrow the drainage hole or clearly encircle the root ball
• When the substrate has lost structure, drains poorly, or is visibly exhausted
• For newly purchased plants from commercial centers – commercial substrates are usually unsuitable for long-term cultivation

Repotting procedure:

1. Do not water for 3–5 days before repotting – dry substrate separates more easily from roots and they break less
2. Gently remove the plant and carefully brush or shake old substrate from the roots
3. Carefully examine roots – remove dry, rotten, or damaged sections with clean scissors
4. For cacti with dense spines, use folded newspaper, kitchen towels, or polystyrene strips as hand protection
5. Allow exposed roots to air-dry 1–2 days – especially if you removed damaged sections
6. Pot into new containers filled with dry substrate; the root neck should be slightly above substrate level
7. Do not water for 5–7 days after repotting – roots need time to heal minor injuries
8. After a week, water carefully and sparingly for the first time

Selecting the right pot:

• Ideally 1–2 cm larger than the previous one – in too large a container, substrate dries slowly and root rot risk increases
• A drainage hole is an essential requirement, not merely a recommendation
• Terracotta (clay) pots are an excellent choice – they allow air and excess moisture to pass through the walls
• Find the right container in our selection

Propagation

Succulents propagate surprisingly easily and most methods require no special equipment.

Leaf cuttings

Ideal for: Echeveria, Sedum, Graptoveria, Crassula

1. Carefully remove a healthy, fully developed leaf – it must come away completely, including the base, or it won't root
2. Allow 2–3 days to dry in air in shade
3. Place on the surface of slightly moist substrate – do not bury
4. Mist gently every 2–3 days; direct watering would rot the leaf
5. In 2–4 weeks, small roots appear at the leaf base along with a miniature rosette
6. The original leaf gradually dries and falls away – let nature work; once the new plant is large enough, pot it up

Offsets

Ideal for: Aloe, Sempervivum, Echeveria, Haworthia, many cacti

Most succulents naturally produce side shoots or daughter rosettes. Detach them with a sharp, clean tool (ideally with their own roots), allow the cut 1–2 days to dry, and pot in moist substrate. Separation is the least stressful of all propagation methods for both parts.

Stem cuttings

Ideal for: Sedum, Crassula, Aeonium, columnar cacti

With a clean knife or scissors, cut a shoot 5–10 cm long. Remove lower leaves so they don't need to be buried in substrate. Allow 3–5 days to dry until the cut surface calluses over, then insert into slightly moist substrate. Do not water for at least a week.

Seeds

Propagation from seed is slow but highly rewarding for many growers. Cactus and succulent seeds are often tiny – sow them on the surface of sterile, fine substrate (uncovered or only lightly dusted). Germination occurs at 20–25 °C with constant moisture under transparent film or cover. Expect germination in 1–4 weeks; seedlings will be very slow-growing in their first year.

Winter Care

Winter is a physiologically critical period for succulents and cacti. Proper overwintering – especially the combination of cold and dryness – is the most important prerequisite for abundant spring flowering.

Desert cacti:

• Temperature: 5–10 °C (unheated hallway, sunroom, cool bright stairwell)
• Watering: Stop watering completely from November through the end of February
• Light: As much as possible – ideally a south-facing window; in winter there's never enough light
• Cold and completely dry overwintering reliably stimulates flower bud formation in spring

Succulents (Echeveria, Crassula, Aloe):

• Temperature: 10–15 °C
• Watering: Minimal – once every 3–4 weeks, only small amounts, just so substrate dries through
• Light: Maximum available light; if etiolation increases, supplement with LED lighting

Epiphytic cacti (Schlumbergera – Christmas cactus):

• Temperature: 10–15 °C for 6 weeks in fall (October–November) – this temperature difference is the key trigger for flowering
• Watering: Limited, but substrate must not dry completely – epiphytes are more sensitive to dryness than desert species
• Once buds set, move to constantly warmer location; do not move the plant again or buds will drop

Frost-hardy species for outdoor cultivation in the Czech Republic:

• Sempervivum – overwinters without any protection, snow causes no problems
• Sedum acre, S. album, S. reflexum – fully hardy, no winter care requirements
• Opuntia humifusa – hardy prickly pear tolerating temperatures to -20 °C
• For all outdoor species, protection from winter moisture is essential – a waterlogged root system is damaged by frost much more readily than a dry one

Most Common Mistakes and How to Avoid Them

1. Overwatering

Problem: Soft, translucent, or yellow leaves that separate easily; black discoloration at stem base; smell of rot.
Solution: Stop watering immediately. Remove the plant, cut away all rotted roots and stem sections with a clean tool, allow roots to air-dry 1–2 days, and pot in dry substrate. At the next watering, wait longer than feels natural.

2. Unsuitable substrate

Problem: Substrate compacts into a hard block when dry, water runs over the surface, or conversely, soil remains moist for days.
Solution: Repot into a draining mix with perlite or pumice (see Substrate section).

3. Too little light

Problem: Etiolation, paling, color loss, plant leaning toward the window.
Solution: Move to a brighter location or supplement with LED lighting – preferably a full-spectrum fixture suspended 15–30 cm above the plant.

4. Pot too large

Problem: Large substrate volume retains moisture long after watering; roots cannot process it and begin to rot.
Solution: The pot should be only 1–2 cm larger than the root ball.

5. Watering rosette-formers from above

Problem: Water pooling in the rosette center causes rapid heart rot, usually irreversible.
Solution: Always water under the leaves or via bottom watering from the saucer – empty excess water after 30 minutes.

6. No winter rest

Problem: Cacti don't flower year after year; plants are limp, growing weakly.
Solution: Ensure cool (5–10 °C) and dry overwintering for at least 6–8 weeks (see Winter Care section).

FAQ – Most Frequent Questions

Why won't my cactus flower?

The most common cause is lack of a cool winter rest. Desert cacti need 2–3 months at 5–10 °C without watering to physiologically enter the reproductive phase and set flower buds. Other factors include chronic insufficient light, pot too large, and plant youth – some species flower for the first time only after 5–7 years.

How do I tell if a succulent is overwatered or underwatered?

Overwatered: Leaves are soft, translucent or yellow, and separate easily from the stem. Substrate is moist or wet.
Underwatered: Leaves are shriveled, thin, or wrinkled. Substrate is completely and persistently dry. Simply water properly – a well-supplied plant recovers within several days.

Can I move succulents outside in summer?

Absolutely – succulents and cacti welcome outdoor time in summer and typically respond with vigorous growth. The key is gradual acclimatization: begin with a week in partial shade or morning sun, otherwise you risk leaf scorch from the plant's adaptation to weaker indoor light. Also ensure protection from heavy rain – while short-term waterlogging is less dangerous at summer temperatures, avoid it for sensitive species. Return plants indoors before the first autumn frosts.

How often should I repot?

Young, fast-growing plants should be repotted annually. Mature cacti and succulents need repotting every 2–3 years, or sooner if roots visibly overgrow the container.

Are succulents toxic?

Most succulents are safe for humans or only mildly irritating. A notable exception is the genus Euphorbia (spurge) – the milky sap (latex) of these plants is strongly irritating, causes skin burns, and in contact with eyes can cause serious damage. Always wear gloves and safety glasses when handling euphorbias and wash your hands thoroughly after work.

Conclusion

Succulents and cacti are forgiving plants – they're not easily killed by care, and when there are problems, the grower usually caused them. Master the four basic principles – well-draining substrate, a pot with drainage, restrained watering, and sufficient light – and you've won half the battle. Add cool winter overwintering and your cacti will reward you with flowers that many a neighbor will envy. Browse our selections of succulents and cacti and assemble your own collection – whether for a windowsill, balcony, or garden.

Sources

• Royal Horticultural Society (RHS) – Cacti and succulents: rhs.org.uk/plants/types/cacti-succulents
• International Crassulaceae Network – Cultivation guides
• Pilbeam, J. – The Cactus Handbook (2010)
• Institute of Botany, Czech Academy of Sciences – Succulent plants and their cultivation