A bark-rich Hoya substrate designed to create an open, structured and freely draining root environment.

Forty-five percent graded pine bark forms the framework, complemented by chunky perlite, washed coco husk chips and 20% BioActive growing medium.

• 45% graded pine bark: Combines 8 to 15 mm and 15 to 25 mm particles for a deliberately bark-rich structure.
• 25% chunky perlite: Low-dust European particles, approximately 5 to 15 mm, add a lightweight mineral component.
• 10% washed and buffered coco chips: Adds moisture retention through coarse 10 to 15 mm particles.
• 20% BioActive foundation: A measured proportion of a complex growing medium containing materials such as composted plant matter, worm humus and biochar.
• Laboratory-informed development: A tested sample measured approximately pH 5.9 in water. This describes the tested sample, not a guaranteed value for every bag.
• Published recipe: Measured, mixed, inspected and packed by PlantScraper in Prague.

• Hoyas with epiphytic or semi-epiphytic growth habits
• Dischidias and similar plants suited to coarse substrates
• Plants requiring an open root zone and effective drainage
• Ventilated pots and hanging containers with drainage
• Growers replacing dense general-purpose potting soil

How it differs from Aroid Mix: Hoya Mix contains 45% bark and 20% BioActive, compared with 20% bark and 30% BioActive in Essential Aroid Mix. Its character comes from that bark-rich recipe, rather than from added tree fern fibre.

Use directly from the bag in a pot with effective drainage.

Position the root system and work the mix gently around it. Tap the pot to settle the particles without compressing the bark into a dense mass.

Water thoroughly, then allow excess water to leave the pot. The chunky surface may dry before the centre, so check moisture around the root zone rather than watering only by appearance.

Adjust watering to the Hoya species, pot, light and seasonal conditions.

Percentages by volume

• 20% BioActive growing medium
• 40% small pine bark, 8 to 15 mm
• 5% large pine bark, 15 to 25 mm
• 25% chunky European perlite, approximately 5 to 15 mm
• 10% washed and buffered coco husk chips, approximately 10 to 15 mm