Plants that should not be sprayed with neem oil are certain flowering plants, young seedlings, delicate herbs and leafy greens, African Violets and Fuzzy Leafed plants, Orchids, Ferns and Succulents and Cacti.
Spraying neem oil on certain flowering plants can harm blooms and attractants, so you should avoid spraying the flowers directly with the neem oil.
Neem oil can cause burns to tender new growth, so neem oil should not be sprayed on the young seedlings and young plants.
The hair and fuzz on African Violets and fuzzy leafed plants can trap the neem oil and potentially lead to the plants rotting.
Neem oil residue can also ruin the Orchids aesthetic appeal and delicate blooms.
And the delicate leaves of ferns can also easily get their pores blocked from neem oil and prevent the ferns from breathing properly or at all.
And neem oil can clog the waxy surfaces of succulents and cacti, which will hinder the water retention of the succulents and cacti and cause tissue damage.
Neem oil can basically block plants pores and damage delicate plant foliage and leave residue on plants.
Neem oil can also interfere with the plants natural adaptations, which lead to plant damage or suffocation of the plants.
When using neem oil on plants you should do a patch test first and apply the neem oil to the plants in the evening hours, to avoid sun scorch and also use the neem oil sparingly as the neem oil can also harm insects that are beneficial like bees.
To do a patch test with the neem oil, test the neem oil on a small leaf of the plant first to check for any sensitivity.
And after spraying the neem oil on the plant leaves, gently wipe the plant leaves with a damp cloth to avoid and remove the neem oil buildup residue.
And always dilute the neem oil properly and avoid spraying the plants with the neem oil when bees or other beneficial insects are active.