Much has been written about feeding orchids. Since that fateful day in 1975 (when I purchased my first paph), we have tried a number of different fertilizers. I love good food and variety. So do orchids. Our suggestion: use a variety of fertilizers, but always under fertilize. If the manufacturer’s recommendation is a teaspoon per gallon, use 1/4 teaspoon per gallon. It is imperative to use diluted concentrations only since most orchid roots are sensitive to fertilizer burn. A good year-round fertilizer is Peter’s 20-20-20. We also use Epsom salts once a month at a rate of one teaspoon per gallon of water. The magnesium promotes good flowering and root growth. The so-called “Orchid Fertilizers” that are high in nitrogen are best avoided unless you can discipline yourself to use it only as a new growth appears and to encourage new growth. The problem is that if a high nitrogen fertilizer is used too frequently, it tends to inhibit flowering. Unless you love orchid foliage and few or no flowers, we suggest using high nitrogen fertilizers in moderation.