The McAllen Foreign-Trade Zone (FTZ) is located south of McAllen between McAllen and Reynosa. Commissioned in 1973, it was the first inland foreign trade zone in the United States and continuously ranks among the most active FTZs in the nation.
Marigolds take around 45 to 50 days to flower after you plant seeds, so seeds sown in early April should flower by May.
If you enjoy growing marigolds, French dwarf varieties have shown the most consistent control (of nematodes, not insects!). Plant these marigolds in an infested garden and maintain a solid stand for three to four months to reduce nematodes. After the appropriate amount of time, plow the plants under as green manure.