Robert writes
Osmocote Plus 15-9-12 8 - 9 Month Standard Release Fertilizer would be a good general fertilizer for your Illicium parviflorum (yellow anisetree, swamp star-anise). For specific fertilizer recommendations, we do recommend having a soil analysis done to determine the exact nutrients your soil/plants may need for optimum results. Please view our Soil Test Kits or contact your Master Gardener with the County Extension Office for a soil analysis.
Answer last updated on: 10/28/2021