Curiosities at The Old Chemist

Watering

During the active growth period (spring–early autumn), water deeply but infrequently—about once every 3–6 weeks.

Allow the soil to dry out completely between waterings; test by inserting a wooden skewer or your finger 2–3 cm into the mix.

In winter, reduce watering to once every 2–3 months or whenever plants show slight shrivelling.

Always water at the base of each cactus to avoid wetting the body and inducing rot.

Gently dust spines and bodies with a soft brush or compressed air to remove debris.

Clear away fallen leaves, dead blooms, or stray soil particles with tweezers.

Do not wipe with water—excess moisture can encourage fungal spots on the epidermis.

Light: Provide at least 6 hours of bright, direct sunlight daily (south or west-facing window is ideal).

Acclimation: Move plants gradually into stronger light to prevent sunburn.

Temperature: Maintain daytime between 18 °C and 30 °C; allow nights to drop to around 10 °C for cooler rest.

Desert gardens thrive in low humidity; avoid kitchens, bathrooms, or humidifiers nearby.

Position where gentle air circulation occurs but without cold drafts or blasting AC vents.

If foliage appears limp or tissue darkens, check for excessive moisture or poor airflow.

Inspect monthly for mealybugs, scale, or spider mites hiding in crevices.

Treat small infestations with a cotton swab dipped in rubbing alcohol or a mild neem-oil spray (5 ml per litre of water).

Quarantine affected plants and allow 2–3 hours of open-air drying before returning them to the main display.