Flourish Excel provides bioavailable organic carbon essential for plant growth. While plants typically obtain carbon from CO2, they can also benefit from simple organic compounds like photosynthetic intermediates. Flourish Excel can be used alone or alongside CO2 injection. Using both together can be especially advantageous when CO2 levels might cause dangerously low pH. Additionally, Flourish Excel has iron-reducing properties that convert iron to its more readily usable ferrous state (Fe+2), making it more accessible for plant uptake than ferric iron (Fe+3).