Dragon fruit are light feeders compared to many fruiting plants. The most common mistake is applying too much nitrogen — this produces lush, vigorous growth but delays or prevents flowering. The plant channels its energy into foliage rather than fruit.
Simon uses a balanced slow-release fertiliser in spring to support early growth, then switches to a potassium-heavy feed as flowering approaches. The timing of this switch is important.
Spring feeding
Apply a balanced NPK fertiliser (such as 10-10-10 or similar) in September or early October as the plant comes out of its winter dormancy. This supports new cane growth and prepares the plant for its flowering season. A slow-release granular fertiliser worked into the soil around the drip line is ideal.
Pre-flowering switch
As you start to see bud formation — typically from late spring into early summer — switch to a potassium-heavy fertiliser. Potassium supports fruit development, skin quality, and sugar content. High-nitrogen feeds at this stage will encourage leaf growth at the expense of fruit.
Simon's note: I've found that less is more with fertilising. Dragon fruit in well-prepared soil often need less fertiliser than you'd expect. If you're seeing lots of lush growth but no flowers, nitrogen is almost certainly the issue — cut it back and switch to potassium.
Key tips
- Use a balanced NPK (e.g. 10-10-10) in spring — September through October
- Switch to a high-potassium fertiliser when buds begin to form
- Avoid excessive nitrogen — it delays flowering and reduces fruit set
- Apply fertiliser to the drip line, not directly at the base of the plant
- Water in fertiliser thoroughly after application
- Do not fertilise during winter dormancy