I bought this Little Lanterns Columbine in the spring and planted her in a container using Miracle Gro potting soil. She now has developed browing leaves and it's only getting worse, no matter where I move her (less sunlight). I water her only when the soil gets dry on top, and the seedlings she's already planting have the same browning leaves. Also, there are some tiny mushrooms growing in the pot, which aren't appearing in the lily pot that I planted at the same time, using the same potting soil. Please help! I love my little Columbine, but I don't know what to do to help her! Thanks for any insight.