If you grow any of your own food, you’ll be familiar with the peculiar blank look that comes over the faces of non-gardeners when you let slip that you’re fretting about frost, or looking forward to getting your sweetcorn in at the weekend. I imagine Martin Crawford gets that same look a lot when he talks to regular gardeners about the subject of his new book How to Grow Perennial Vegetables because most of us aren’t all that familiar with the topic. When pressed we could probably only think of a few; asparagus, globe artichokes, and that’s about it.

cover for perennial vegetablesHow to Grow Perennial Vegetables isn’t the first book that deals with growing in the UK, but it is the first one to offer such a wide spread of unusual plants that can be grown in a bed or border as a really practical alternative to ornamental flowers and shrubs. After reading it, I’m pleased to report that I’m feeling quite enthused about the possibilities of integrating some perennials into my plot without feeling I have to move towards a forest garden model (which, frankly, has always daunted me).

As the owner of what is probably the finest temperate-zone forest garden anywhere on the planet, Martin Crawford really knows his Welsh onions. He’s up-front about why commercial growers haven’t shown much interested in perennials in the past (harder to weed, lower outputs per hectare), but equally candid about the benefits (such as reduced carbon emissions from tillage). Perennial gardening may give less food per plant than conventional annual growing, but it’s also a lot less work and doesn’t need the huge input of compost each year that no-dig does. Grouped together properly, a perennial bed largely looks after itself with only minimal intervention.

While I was waiting for my review copy to arrive I made a short list of the things that have put me off these unfamiliar plants in the past. Lack of familiarity is of course the top of my list but there’s also how to group them properly, which is much more important for plants that are going to be around for years than it is for annuals. Then there’s the trick of how to get some of these tricky seeds to germinate in the first place – how many of us would have the confidence to pour nearly boiling water over seeds, as you have to with some perennial legumes?

Happily, I found myself crossing my misgivings off the list one by one. Martin Crawford has clearly thought things through very carefully, and has skilfully constructed a bridge between the forest gardener and traditional grow-your-own bodgers like myself. I’ve always struggled to motivate myself to look after areas of the garden that don’t feed the family, but the information in the early sections of this book should help me to phase out fussy ornamentals in favour of low-maintenance edibles that fill all the same niches, and look good to boot. Provided, the author stresses, I don’t want it all to look neat and tidy.

The lion’s share of the book, though, is devoted to an A-Z of the perennial vegetables themselves. These have had to be kept quite brief, because there are more than a hundred of them. Each plant has a short description, remarks on planting and cultivation, instructions on when and how to harvest, and lastly some culinary uses. Because of the sheer volume of plants the culinary tips are quite short and it’s here, I think, that the book is at its weakest. Cooking vegetables may not be rocket science, but lack of experience with these unfamiliar harvests is one of the things that puts people off giving them a try. Recipes for some of the more important plants, or even a sample meal with mouthwatering photographs, would have made all the difference for me.

The A-Z more than makes up for this omission with its sheer scope. It covers not only well-known perennials like rhubarb, asparagus and globe artichokes, but wild plants such as nettles and ramsons and plenty of real exotics too, like oca and the much under-rated sea buckthorn. Even this staggering list has barely scratched the surface of Crawford’s encyclopaedic knowledge of edible perennials, as visitors to his website www.agroforestry.co.uk/ will soon find out.

Perennial vegetables may never replace the staple crops that the world depends on, but they certainly deserve to have a bigger space on our plates. If you’re prepared to grub out some unproductive ornamentals and pop in a few long-lived food plants instead, How to Grow… will show you how. Oh, and the hostas? You can leave them. Apparently the young leaf clusters are delicious.

How to Grow Perennial Vegetables by Martin Crawford is available from Amazon.

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