graphite

Further Invasive Plant Sketchbook Studies: Plants include Bridewort, Dwarf Serviceberry, Dwarf Japanese knotweed, and False acacia

Invasive Insects Sketchbook Study Sheets botanical illustrations, notes, and entomological illustrations by Lizzie Harper.  Pests featured are the Plum weevil, Japanese beetle, and Apple maggot fly, along with the Xylella fastidiosum bacterium

Cabalva Single Estate Perry pencil illustration of pears and blossom for use on the Perry bottle label

Pencil illustrations for Rodales Vegetable Garden Problem Solver.  Numerous graphite illustrations of pests, plant damage, growing techniques, and healthy vegetable crops for this horticulture bible.

Pencil illustrations of gardening techniques and vegetables for Homegrown by Marta Teegan.  This book focuses on having a successful container garden, even in urban environments.