Fertilizing. As a general rule, fertilizeorchids every 2 weeks during peak growth (spring and summer) and once a month during dormancy (fall and winter). Use a 30-10-10 fertilizer or orchid food, diluted to half strength. Tips for FertilizingOrchids Correctly. Because strong roots, shoots, and leaves are a must if you want more blooms, Kondrat recommends the following practices to fertilize your orchid properly. Additional Tips for FertilizingOrchid Plants. While it is essential to provide your orchid with the necessary nutrients, there are certain times when you should hold off onfertilizing. How Often to FertilizeOrchids Indoors. Orchids should be fertilized at least once a month. For best results, however, fertilizer should be diluted and applied weekly, especially during the growing season. This method is called “weakly weekly’. Caring for orchids doesn’t have to be complicated, but a few key elements will make all the difference. In this article, gardening expert and orchid enthusiast Melissa Strauss discusses the importance and methods of fertilizingorchids for abundant, beautiful blooms. Author avatar. How to fertilizeorchids for healthy indoor plants – and the best feeds to use. Too much fertilizer can harm orchids, so make sure you know when and how much to give your plants. Learn the best methods to fertilizeorchids, including choosing the right fertilizer, application techniques, and essential tips for robust growth. When fertilizing sensitive orchids with liquid fertilizer, you’ll want to know the TDS level of the water source you’ll be adding the fertilizer. Generally, for non-terrestrial orchids, it’s best to add fertilizer to water that contains less than 175 ppm (or 175mg/liter). Why You Should Feed Your Orchids. How to Choose an OrchidFertilizer. Tips When Choosing OrchidFertilizers. What Are Soluble Salts? When Is the Best Time to FertilizeOrchids? Dialing in the Fertilizer Formula for Orchids. two photos of the same orchid, one in bloom, the other not. This is the same plant. I’ve got it to bloom three times in the past two years. It’s out on the patio for the summer. Learn how to properly fertilizeorchids with orchidfertilizer to keep them at their healthiest and help them produce their best blooms. The American Orchid Society's mission is to promote and support the passion for orchids through education, conservation, and research. What is in orchidfertilizer? Fertilizer for orchids is composed of a three-part number separated by dashes, composed of nitrogen, phosphorous, and potassium. Some fertilizers have a small doses of calcium and magnesium, but most concentrate on the first three elements. Seasonal FertilizingTips. The best time to fertilize your Common spotted orchid is during its active growing season in spring. This is when the plant's nutrient requirements are the highest. Decrease fertilization in the autumn and avoid it entirely during winter dormancy.