The Forager’s Calendar by John Wright is a good one for learning about plants, fruit and fungi through the seasons. If they’re more into fungi then The River Cottage Handbook on fungi (also John Wright) is my fave as its easy to use. If they’re really keen then the Roger Phillips book is supposed to be the mushroom bible but it’s big and might be too daunting for a beginner.
For someone into gardening, Japanese tools are a great buy. Got my mum one of these Hori Hori knives and a mini scythe type thing, she loved them, and now all her friends have been getting them since seeing hers.
A subscription to Cotton Clara? You can cancel anytime. I did it for a while and really enjoyed it but i prefered the embroidery and felt i was getting more cross stitch so ended it but its really nice designs and packaging ans you sometimes get extras like really sharp embroidery scissors or a tape measure etc. You can buy some kits individually too but the subscription is a sweet way to get started