Why is the center of my Birds Nest Fern, (Asplenium nidus) turning brown black? , The fronds are breaking off from the brown center and my nest is looking bald, I get this question often and the Green Air Layering: Multiply Your Plants Without Uprooting Them Air layering is a simple and efficient technique to propagate a plant while keeping the original one untouched and thriving. Here's how Should I put paste on a bonsai tree cutting? Ginseng Ficus Bonsai Tree Medium (Ficus Retusa)