We have produced taxol from leaves and twigs of Taxus plant found in Nepal. Is there any org that provides seed/start up fund for such activities or any investors willing to invest in this.

You can keep a watch on the following page which covers grant opportunities for start-up business activities. There are several social impact investments that offer funding for small-scale social entrepreneurship activities.

https://www2.fundsforngos.org/category/social-entrepreneurship/