Charles from Cambridge, Md writes
Yes, you could use Bonide All Seasons Horticultural Spray Oil on evergreens and most other plants. Just be careful about spraying any kind of oil product when temperatures are over about 85 degrees to reduce risk of damage. Per the product label: This product may cause discoloration of Blue Spruce. Do not use on conifers or ferns not tolerant to oil sprays (e.g. Alberta Dwarf Spruce).
Answer last updated on: 08/20/2021
