I'm not a regular reader of the FT, so none of the material here is familiar. If you've been a regular follower of the author, there may be a sense of deja-vu from his newspaper column.
Organised, broadly speaking, around the seasons the book is a compendium of light, readable cuttings of advice, reminiscences, commentaries, biographies and travelogues. As such, it can be dipped-into at will or read for seasonal advice or cover to cover. No cutting will detain for more than 5 minutes.
Apparently drawn from decades of material, none of the cuttings are dated as such. Some, I'd suggest the less successful, can be dated by context of discussing a death from years back.
Given the readership of the FT, it's no surprise that the author assumes that visiting gardens in France, Italy or America could very well be on the reader's itinerary.
For me, the most successful aspects of the book are the out and out advice on plants, nurseries, preferred cultivators, planting schemes etc. The author is unabashed in advocating Miracle Grow over organic methods and dislike of prairie planting.
There is just enough photographs of plants and gardens to be helpful, though more would be welcome.
Given it's organising structure, I couldn't help but to compare with Stuart Thomas' Cuttings from Garden Notebook from 1997. If obliged to choose, I would still favour this as a compendium of practical advice to the more thoughtful gardener, while accepting that Lane Fox is painting on a broader canvas.