Orange Guard Ornamental Plant Home Pest Control - Water Based Formula Orange Guard for Ornamental Plants is the same proven formula, but when applied to ornamental plants, it becomes a repellent. At a 4 parts water/1 part Orange Guard for Ornamental Plants dilution, the effects on aphids and spider mites is almost 100% control. At 6 parts water/1 part Orange Guard for Ornamental Plants the control is still over 90%. When spraying, avoid open blooms, new growth and the heat of the day. It is best to hydrate the plant 30 minutes before application. |