posted 4 years ago
Most sunflowers like sunny locations with dry soil. There is one called swamp sunflower, Helianthus angustifolius that might work for you.
If you are planting your cover crop now, I would suggest winter rye as it will die back when the weather gets warm enough.
Some information about your planting zone or what part of the world you are in might help with suggestions.
Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner