My plant was just doing perfectly to the 4 week of flowering, planted on May 15th. It´s only one of them. Natural sunlight, rain water on a 10lts pot. on a building roof. Today I discovered one of the leaves getting yellow, and small brown pots on it. The only feeding I did, is 10-50-0, two times, after they starting flowering, and was about 2 tablespoon each. 15-15-15, every 3 weeks during veg, 0 problems. It´s rainy season, so it rains a little every day, but last week there was no rain for 7 days, and I did not water it, because there is rain today. Before todays rain, the soil feels dry on top. Pls help, this is my first grow, an my first problem.