| Tectona grandis | Freshly collected flowers are used. Old trees are preferred for collection. Allelopathic treatments are done before collection of flowers. |
| Azadirachta indica | Freshly collected flowers are used. Old trees are preferred for collection. Allelopathic treatments are done before collection of flowers. |
| Buchanania lanzan | Freshly collected flowers are used. Old trees are preferred for collection. Allelopathic treatments are done before collection of flowers. |
| Mangifera indica | Shade dried flowers are used. Old trees are preferred for collection. Only flowers of indigenous species are used. Allelopathic treatments are done before collection of flowers. |
| Ocimum sanctum | Freshly collected flowers are used. Flowers of other species of Ocimum are not used. Allelopathic treatments are done before collection of flowers. |
| Chloroxylon swietenia | Shade dried flowers are used. Old trees are preferred for collection. Allelopathic treatments are done before collection of flowers. |
| Curcuma caesia | Shade dried flowers are used. Allelopathic treatments are done before collection of flowers. |
| Ixora pavetta | Shade dried flowers are used. Allelopathic treatments are done before collection of flowers. |
| Terminalia arjuna | Shade dried flowers are used. Old trees are preferred for collection. Allelopathic treatments are done before collection of flowers. |
| Gloriosa superba | Shade dried flowers are used. Allelopathic treatments are done before collection of flowers. |
| Momordica charantia | Freshly collected flowers are used. Allelopathic treatments are done before collection of flowers. |
| Andrographis paniculata | Shade dried flowers are used. Allelopathic treatments are done before collection of flowers. |
| Hibiscus rosa-sinensis | Shade dried flowers are used. Allelopathic treatments are done before collection of flowers. |
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