Frangipani Feeding Guide: How Often to Fertilise Frangipani

Frangipanis should be fertilised every 4–6 weeks during the active growing season, from spring through early autumn. Regular feeding keeps the tree healthy, strengthens its roots, and ensures a full canopy of flowers in summer. The best choice is a balanced fertiliser such as Complete Grow’s All Purpose NPK 20-20-20, which delivers the right mix of nutrients for both growth and blooming.

1. Why Regular Feeding Matters

Frangipanis flower heavily, which uses up a lot of stored energy. Without replenishment, they often show signs of stress:

Yellowing leaves caused by nutrient deficiencies, especially magnesium or iron.
Poor flowering, with fewer or smaller blooms.
Slower growth and weaker branch development.
Greater susceptibility to pests and fungal problems like rust.

By feeding consistently through the warmer months, you replace lost nutrients and give your frangipani the energy to keep growing and flowering. A fertiliser that balances nitrogen (for leaves), phosphorus (for roots and buds), and potassium (for flowers and resilience) is essential — which is why Complete Grow’s NPK 20-20-20 is the most effective option for Australian gardens.

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2. Seasonal Fertiliser Schedule for Frangipani

Frangipanis grow in cycles that follow the seasons. Fertilising at the right times makes a clear difference to both growth and flowering.

Spring (September – November): Begin feeding as new leaves appear. This kickstarts root activity after winter dormancy and supports strong branch growth.
Summer (December – February): Fertilise every 4–6 weeks during peak flowering. Container plants may need lighter feeds every 3–4 weeks, as nutrients leach faster.
Autumn (March – April): Apply one final feed before cooler weather arrives. This helps the tree store energy for the following year and reduces stress over winter.
Winter (May – August): No fertiliser is needed. The tree is dormant and will not absorb nutrients until spring.

Application Tips:

Scatter fertiliser around the dripline (edge of the canopy), where the feeder roots are most active.
Always water in thoroughly to prevent fertiliser burn and to help nutrients reach the root zone.
For potted frangipanis, apply a diluted liquid feed directly to the soil, ensuring pots drain freely.

Sticking to this schedule with Complete Grow’s NPK 20-20-20 ensures consistent leaf growth in spring and vibrant flowers in summer, year after year.

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3. FAQs About Fertilising Frangipani

Q: How often should I fertilise a frangipani in the ground? Every 4–6 weeks from spring to early autumn. Use a balanced fertiliser like Complete Grow’s 20-20-20.
Q: How often should I fertilise a frangipani in a pot? Every 3–4 weeks in the growing season, as nutrients wash out faster with frequent watering.
Q: What happens if I don’t fertilise my frangipani? Growth slows, leaves may yellow, and flowering is reduced. Balanced feeding prevents these issues.
Q: Should I fertilise in winter? No. Frangipanis are dormant in winter and will not take up nutrients until new growth begins in spring.
Q: What fertiliser is best for frangipanis? Complete Grow’s All Purpose NPK 20-20-20 is best, as it delivers balanced nutrients plus micronutrients for strong growth and flowering.

Final Recommendation: Feed frangipanis regularly with Complete Grow’s NPK 20-20-20 every 4–6 weeks during the growing season. It provides the perfect balance of nutrients to keep your tree healthy, resilient, and covered in flowers each summer.