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Sedum Care Sheet

Sedums (stonecrops) are drought-tolerant, low-maintenance succulents perfect for green roofs, vertical planting systems, and container displays. Their fleshy leaves store water, making them resilient in harsh conditions. However, for peak performance — especially in a display or show setting — routine care is beneficial.

Light Requirements

Full sun is ideal (6–8 hours daily).

Tolerates partial shade but flowering and colour may reduce.

Watering

General Guidance

  • Water deeply but infrequently. Allow soil/substrate to dry between watering.

  • Avoid overwatering — especially in pots and walls where drainage may be less forgiving.

  • Water early in the day to prevent rot or mildew on foliage.​​

Green Roofs

  • First year: Water twice per week in dry spells to help root establishment.

  • After establishment: Water only in prolonged droughts (7–10 days without rain).

  • Use leaky hose fed from a rain butt or IBC via a small submersible pump.

  • Recommended hose: porous rubber or microporous irrigation tubing.

  • Run system 15–30 mins, 1–2 times per week in dry weather.

  • Use a timer or manual switch. Install filter on pump to avoid sediment blockages.​

Green Walls

  • Require more regular watering due to faster drying and gravity drainage.

  • Use the same leaky hose system, ideally zoned in tiers.

  • Water 2–3 times per week in summer, less in winter.

  • Walls should have free-draining substrate and good airflow.​

Pots

  • Water once every 5–7 days during dry periods. Less in cool or humid weather.

  • Check depth moisture by poking a finger 2–3cm into the soil.

  • Ensure terracotta pots have drainage holes and are lifted off ground to prevent waterlogging.

Feeding

  • Sedums thrive in low-nutrient conditions, but an occasional feed improves flowering and colour.

  • Apply a dilute, balanced liquid feed (e.g. 10-10-10 or 6-4-4) once in spring, and once in early summer.

  • Avoid high-nitrogen feeds — these can promote weak, leggy growth.

  • For potted sedums, use a slow-release granular fertiliser in spring or a weak liquid feed monthly during growing season (March–August).

Pruning & Deadheading

After Flowering

  • Remove spent flower stems in late summer or autumn by cutting back to the rosette/base.

  • Use clean, sharp scissors or secateurs.

  • Deadheading helps maintain neatness and prevents unwanted seeding.
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Annual Tidy (Autumn or Early Spring)

  • Remove any dead or damaged foliage.

  • Trim back leggy growth to encourage dense, compact habit.

  • For green roofs and walls, do a gentle rake or hand-clear to remove debris, moss, or weeds without disturbing the substrate.

Pests & Problems

  • Generally pest-free, but watch for:

  • Slugs/snails in pots or damp walls – use copper tape or manual removal.

  • Rot from poor drainage – amend soil with grit or perlite.

Rainwater/Irrigation notes

  • Rainwater is ideal — low in lime and soft.

  • Use a submersible pump (rated for irrigation) in an IBC or rain butt.

  • Fit a fine mesh filter to intake to avoid clogging drip systems.

  • Include a pressure reducer if needed for consistent flow in porous hoses.

  • A solar-powered pump or timer can make it off-grid and sustainable.

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