What Are Heirloom Plants? A Grower's Guide to Heritage Varieties

A wooden crate of mixed heirloom tomatoes in red, yellow, green and deep purple

Walk through any modern garden centre and you will find rows of uniform, reliable hybrids bred for shelf life and shipping. There is nothing wrong with them — but they are not the whole story. At Canwood Botanical we raise heirloom plants: the older, open-pollinated varieties that gardeners have saved and shared for generations. Here is what that actually means, and why it matters.

What makes a plant an heirloom?

An heirloom (sometimes called a heritage variety) is a plant that is open-pollinated and has been grown true-to-type for many decades — often fifty years or more. Because it is open-pollinated, seed saved from an heirloom will grow into a plant much like its parent, year after year. That is the quiet magic of them: a single variety can carry a family, a village, or a whole region's gardening history inside it.

Heirloom versus hybrid: what is the difference?

Most plants sold today are F1 hybrids — the first-generation cross of two carefully chosen parent lines. Hybrids are bred for consistency, disease resistance and a heavy, all-at-once crop. Their weakness is that seed saved from an F1 hybrid will not come true; the next generation is a genetic lottery.

  • Heirloom: open-pollinated, seed comes true, wide flavour and colour, ripens over a long season.
  • Hybrid (F1): uniform, vigorous, disease-resistant, but seed must be re-bought each year.

Why grow heirlooms?

Flavour and character

Heirlooms were selected by gardeners over generations for taste, scent and beauty rather than for durability in transit. It is the difference between a tomato bred to survive a lorry and one bred to be eaten warm from the vine.

Genetic diversity

Every heirloom variety kept in cultivation is a small act of conservation. As commercial growing narrows to a handful of hybrids, older varieties — and the resilience they carry — can vanish. Growing them keeps them alive.

Seed you can save

Because heirlooms come true from seed, a single packet can become a lifetime's supply. You can save, swap and pass on, exactly as gardeners have always done.

Are heirlooms harder to grow?

Not especially — but they ask for a little more attention. They may crop over a longer, less predictable window and can be a touch more susceptible to some diseases than a resistant hybrid. In return you get flavour, story and self-reliance. For most home gardeners that is a trade well worth making.

Starting your own heritage garden

You do not need an allotment or years of experience. Begin with one or two varieties that appeal to you, grow them well, and save a little seed at the end of the season. That is how these plants have travelled down the centuries — one gardener at a time.

Every plant we raise is grown from seed and cutting here at the nursery, hardened off in season and never forced. Browse the current collection to see what is ready now.