Planting in Square Holes, Plants for Small Arbors, and Long-Lived Perennials

C.L. and Ellen discuss the internet-based rumor that you should dig a square hole when planting trees, and give suggestions for plants to grow on small trellises and arbors. We finish with a discussion about how to know if a perennial plant will reliably return, or if it's a "temperennial." :40  True or False: Plant trees in square holes 7:41 Eat/Drink/Grow:  Plants for small arbors and trellises 20:51  Love Letters and Questions:   Rick writes to ask how you can tell if a perennial plant will live for many years or not.