Shohin bonsai—tiny trees with towering presence—are a marvel of miniature horticulture. Typically no taller than 20 cm (about 8 inches), these small-scale bonsai demand not only artistic vision but also precise care. Among the most critical aspects of their health and beauty is one often underestimated: fertilisation.
Red flowering Hawthorn.
Why Shohin Bonsai Are Unique
Unlike their larger bonsai cousins, Shohin trees live in extremely small pots. This limited space means:
- Less soil volume to retain nutrients and moisture.
- Faster nutrient depletion, especially during the growing season.
- Greater sensitivity to over- or under-fertilisation.
In essence, Shohin bonsai are like high-performance engines in tiny frames—they need just the right fuel, at the right time, in the right amount.
The Role of Fertiliser in Shohin Health
Fertiliser provides essential nutrients—nitrogen (N), phosphorus (P), and potassium (K)—along with trace elements that support:
- Leaf and shoot growth (especially in spring)
- Root development
- Flowering and fruiting (for species like flowering quince or crabapple)
- Overall resilience to pests, disease, and environmental stress
Without regular feeding, Shohin bonsai can quickly become weak, pale, and stunted—not the refined, vigorous specimens we aim for.
How to Fertilise Shohin Bonsai Properly
Here are some key tips:
1. Use a Balanced, Gentle Fertiliser
Opt for a balanced NPK ratio (like 6-6-6) or tailor it to the season:
- Spring: Higher nitrogen to support growth.
- Summer: Balanced or slightly lower nitrogen.
- Autumn: Low nitrogen, higher potassium and phosphorus to prepare for dormancy.
2. Feed Little and Often
Because of the small soil volume, it’s better to feed lightly but frequently. Over-fertilising can burn roots or cause excessive, leggy growth. Using organic fertiliser will minimise this, and I never use chemical fertilisers for this reason and the environment.
3. Choose Organic When Possible
Organic fertilisers release nutrients slowly and improve soil health. They’re gentler and more forgiving—perfect for Shohin.
4. Adjust for Growth Stage and Species
Flowering or fruiting Shohin may need extra phosphorus. Deciduous trees differ from conifers in their nutrient needs. Know your tree!
5. Watch and Respond
Observe your tree. Yellowing leaves, weak growth, or poor back-budding may signal nutrient deficiencies. Adjust accordingly.
Final Thoughts: Feeding the Story
Shohin bonsai are more than plants—they’re living sculptures that tell stories of age, resilience, and beauty. Fertilising them properly is like giving a character in a novel the right backstory—it supports the narrative, adds depth, and brings the whole picture to life.
So next time you feed your Shohin, remember: you’re not just adding nutrients. You’re nurturing a story in miniature.
