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.
Advertisement. In order for your marigolds to be ready for planting outdoors in the spring, you will need to start growing marigolds from seed indoors about 50 to 60 days before the last frost date. Start with a tray or pot filled with damp soilless potting mix. Sprinkle the marigold seeds over the potting mix.ypically, marigolds will take three to four days to germinate, but may take a few days longer if the location is cooler. Once the marigold seedlings appear, remove the plastic wrap and move the tray to a location where the seedlings will get at least five hours or more of light each day.