On Thursday morning, she explains the elements you need to make two types of knot gardens, and demonstrates how to create a small herb garden. Elements for Hampshire, England, Knot Garden: ...

Some knots entwine tightly to form, with no plantings, the design. Other knot gardens have looser designs with additional plants, frequently herbs or bulbs, planted within spaces framed by the design.

Today these ancient herb plots of the medieval castles are called knot gardens. Every time the herbs were sheared to generate more clippings to use indoors, the knot pattern was refreshed.