I grow orchids (hobby) and have used Neem oil successfully for years. I use only products containing only 100% neem oil. There are several brands on the market. My experience is based on my use under the brand, DynaGrow and it has worked very well. Only one minor problem is that if the container is kept in a cool spot it should be warmed sufficiently to allow it to flow more freely but try not to make it too thin. Also mix and shake your Neem oil in advance. In addition, for application I mix it with luke warm water. I use a 2 gal. pump garden sprayer and shake the container to stir up the mix while applying. When applying be sure to do the underside of leaves well-Neem oil is a bit sticky to the touch and your sprayer should be cleaned after each use with a dish detergent. Mix only enough so that you use it all within a few hours. Reapply periodically for meaningfull results.
