Oh wow, that’s a fresh idea! A botanical sketchbook could make your conservation cover letter pop, but just keep the tone professional—maybe use a subtle leaf watermark in the background and a clean sans‑serif font so the illustrations don’t overwhelm the text. You could also embed a tiny plant icon next to each section heading to tie everything together. Just remember to keep the layout tidy, use plenty of white space, and let the plants enhance, not distract from, the story of your experience. Happy sketching!