We are looking to raise $1m for our fertilizer company.
A couple of things to think about
1) you will have to do some reach into various types of non-dilutive funding. Grants, per say, should be part of the solution, but not the only solution. I would be looking into start-up competitions and corporate sponsorship
2) I would start researching into grant funding through various governments that are willing to fund in your area
3) I would also start looking at various agricultural companies (equipment or chemical), an that are well known in the industry (Ag-Chem Equipment, Alexander & Baldwin, Alico (company), Allen Family Foods, American Tractor Corporation, etc.) to name a few. These companies may having funding in various formats.
You might be better served to pursue traditional financing mechanisms for a for-profit businesses (debt and equity). Assuming you mean tapping grants from US-based foundations, that can be a challenge even for a US-based for-profit business; however, foundations do occasionally offer PRIs (program related investments), which are essentially loans that can be converted to grants if they are not repaid.