Imani Green Health Advocates program leader Ajiah Gilbert, left, records data from a honey locust tree with Maybelline Mariscal, 21, during a tree health monitoring training outing in McKinley Park.

One of the oldest advanced techniques of gardening — and one of my favorites — is espaliering, which involves shaping woody plants into two-dimensional shapes. Now, in bare root season, it’s timely to ...

Espalier is an ancient horticultural practice of shape-shifting nature by training trees to grow flat against a wall or trellis. While you may have noticed these fan-shaped trees against a fence in a ...