Lime Sulphur Horticultural Spray

How and to Use Lime Sulfur

Fungal disease spores can overwinter in cracks or fissures on plants or in soil and garden debris. For this reason, lime sulfur is used in high concentrates mixed with oil as a horticultural dormant spray. When to use lime sulfur this way is in late winter or early spring before the plant begins to leaf out. It is also a good idea to spray the soil around plants that have been previously infected or are prone to infection. For perennials or plants that are showing new signs of fungal diseases, lime sulfur can be mixed with water and sprayed on plants anytime except for hot, sunny days. The mixing ratio is 1 teaspoon per gallon (5 ml. per 4 L.) of water. Spray all surfaces of the plant thoroughly. Allow the mixture to sit on the plants for 15 to 20 minutes. Then thoroughly rinse the plants with just clear water.