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Heirloom Tomatoes: Good and Good for You

Jun 11, 2010

Heirloom tomatoes, like Ol' Man River, just keep rolling along. It doesn't seem to matter that their yields are often less than those of modern varieties, or that some have less disease resistance. People continue to pay extra for them at farm stands and markets, and the enthusiasm for growing them is unabated. No one dares publish a seed catalogue without a diverse selection.

By and large, there is no contest between old and new when it comes to flavor. The oldies win and look glamorous, too, in all their shades of red, pink, yellow, green and black, many of them mottled, streaked or striped. For a gardener/cook, the work of growing them is justified by the show-stopping act of setting forth a splendid platter, assembled in minutes.

And consider this: All of them grow well in some particular part of the world where they were lovingly handed down from one generation to the next. Try a number of them and you're bound to find those that perform best in your garden.

It is now becoming more evident that old varieties are better for you as well. Much has been written lately about the "hidden hunger" produced by modern diets that are low in the essential minerals that humans need to get from their food.

A study done by Donald Davis at the University of Texas at Austin, based on Department of Agriculture data, documented the decline in the nutritional density of garden crops since 1950. The culprit: breeding that stresses higher yields and ease of transport as opposed to nutrition. You can impel a tomato plant to produce more fruits, whether by breeding or by using high-nitrogen chemical fertilizers, but its roots will take up only so much of soil minerals such as iron, calcium and zinc. In pumped-up tomatoes, flavor elements are diluted as well. No wonder modern tomatoes are less tasty.

This is not to say that the old varieties can't be improved. After all, they too are just a stage along the way, developed from varieties that came before them. A glance at today's catalogues shows that some breeders are going back to the mother lode of heirloom genetics.

Burpee (http://www.burpee.com) alone lists a Brandy Boy, bred from the popular Brandywine; Tye Dye from the red-and-yellow varieties such as Big Rainbow; Red Lightning from the Red Zebra types; and Black Truffle, from an old black Siberian tomato called Black Pear. John Scheepers Kitchen Garden Seeds (http://www.kitchengardenseeds.com) lists one called Lyn's Mahogany Garnet, an interesting cross between Black Russian and Green Zebra. All sorts of wonderful traits may result from such breeding.

The trick is to not stray too far from the old stock and continue to measure nutrient uptake, so that the fruits maintain a balance of trace elements. Far more research should go into this, but so far a lot of people are voting with their taste buds.

Article copyright of Barbara Damrosch, author of "The Garden Primer." Originally published in The Washington Post and reprinted with permission. Photo credit: Roger Doiron

Comments

Beautiful tomato photo, Roger! It reminds me of the Prudence purple tomatoes I try to grow every year.
Thanks. That shot is from two years ago. Last year's crop was a wash because of late blight. Fingers crossed for tomatoes this summer.
That was a beautiful tomato photo, Roger. As you may recall, I had all but given up from the old site. Am slowly working this site out. But I do look forward to posting pictures. Will we ever be able to put our pictures up? I put out out two white tomatoes, white wonders. One of them has a serious curling problem. I have used an organic fungicide, checked and sprayed for insects, used compost tea, cal mag, phosphorus, you name it.....I have tried it, but the curl persists and then the lower leaves turn yellow, then brown. Funny thing is, there are many tomatoes setting, more than on many of my other heirlooms. I would post a picture for you to see, but well, cannot do that yet. Any suggestions as to the cause and treatment?

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