Everything you need for the maintenance of your orchids. Orchids have very specific nutritional requirements and, although it is true that they can survive on very low levels of nutrition, they will only reach their full magnificence if properly fed. Just ask a professional grower or a consistent winner at orchid shows. Orchids should not be fed with general purpose plant ‘foods’ for many reasons. Most importantly the nitrogen supply in the mass market product will usually contain significant levels of ammonia and urea. Urea in particular can become toxic very quickly in orchid growing media and is best avoided for that reason.