Fertilize outdoor sagopalms every spring with a balanced, slow-release fertilizer, such as a 10-10-10. Follow the package directions for how much to apply. Fertilizer. Sagopalm should be fertilized a couple of times a year in spring and fall with a slow-release fertilizer designed especially for use with palms. For the amount to use, follow... For sagopalm, use balanced nutrition fertilizers with equal NPK ratios to support robust frond growth. Fertilize every 1-2 months during active growth in spring and summer... SagoPalm Care & Growing Guide. Caring for a SagoPalm requires patience and attention to detail, as these plants have specific needs that must be met for optimal growth. SagoPalms, Cycas revoluta, are gorgeous, vibrant statement plants.With feathery light, high-gloss fronds and a richly textured trunk, they add a lush and lively aesthetic to outdoor spaces. Sagopalm is more closely related to a conifer, and it grows best in warm, humid conditions, and requires four to six hours daily of dappled sunlight, acidic soil, and consistent temperatures. Fertilization: For best results, fertilizeSagoPalm three times throughout the growing season (between Spring and Summer). Fertilizing: Your SagoPalm can be fertilized 3-4 times per year. It is especially important to fertilize when new growth appears in the spring and again in late summer to help your palm... How to fertilizeSagoPalm. Nutrient, fertilizer, and repotting needs for SagoPalm: repot after 2X growth.