Hydroponic farming is a soilless agriculture method that allows crops to grow in nutrient-rich water. It is becoming increasingly popular due to its potential for higher yields and more efficient resource use.

1. Government Grants: Governments often offer grants for projects related to sustainable agriculture and food production, which can provide capital for the development and operation of hydroponic farms.

2. Private Equity: Private equity firms can provide funding for hydroponic farms in exchange for equity in the company.

3. Crowdfunding: Crowdfunding platforms can provide access to a large pool of potential investors who are interested in supporting sustainable agriculture.

4. Community Supported Agriculture (CSA): CSA is a business model that involves selling shares of the farm's harvest to members of the community in advance of the growing season. This provides a source of funding for the farm and helps to build a loyal customer base.

5. Agricultural Credit Institutions: These institutions provide loans and other forms of financing specifically for farmers and agricultural businesses. They may offer specialized programs for hydroponic farmers.

6. Angel Investors: Angel investors are individuals who provide funding for early-stage businesses in exchange for equity. They may be interested in supporting hydroponic farming due to its potential for high yields and profitability.