Specific Herbs to Avoid Basil Cilantro (Coriander) Dill Parsley Chives These herbs have a high respiration rate on their leaf surfaces and a sensitivity to oils that can cause severe stress. Stress Indicators to Watch For Wilting or drooping leaves.
Drought Plants Neem Oil Stress Risk
Additionally, neem oil has a slight sulfuric and acidic nature, which can alter the pH balance on delicate leaf tissues, leading to chemical burns or necrotic spots. Plants Currently Experiencing Stress Even if a plant is not on the "do not spray" list, it can still react poorly to neem oil if it is already struggling.
If pests are attacking these herbs, insecticidal soap or a strong water rinse is a safer alternative. Specific Tree Concerns Japanese Maple Norway Maple Silver Maple It is generally best to avoid spraying neem oil on any maple species.
Drought Plants Neem Oil Stress Risk and Sensitive Herbs
Applying it to a plant that is already dealing with drought, root rot, or disease will push it past its recovery threshold. Neem oil is a stressor; it requires the plant to metabolize and process the coating.
More About What plants not to use neem oil on
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