Best Seeds for Your Needs When You Know The Lingo

Get the best seeds for you needs when you know seed terminology.

When I worked at a marketing and communications company, there was a linguistic divide in our office.

The in-house application developers had a vocabulary that was incomprehensible to those of us working the phones.

As an outsider who wasn’t too tech savvy, it took me a while to absorb the new vocabulary.

Specialized Seed Vocabulary

It’s easy to feel like an outsider when you encounter specialized lingo. And it’s not just in the tech sector. (My father-in-law doesn’t realize I miss most of what he’s telling me when he shows me under the hood of his car…and now I have a son who has a whole vocabulary around mountain biking!)

Gardening has specialized vocabulary too. And I’ll be glad if you find this this glossary of seed terminology helpful in choosing the best seeds for your garden.

Glossary of Seed Terminology

Here are common terms that you’ll find when you seed shop. Knowing what they mean will help you get the best seeds for your situation.

Annual

An annual plant has a one-year life cycle. It flowers makes seed, and dies in one year. Common annuals include veggies such as beans, lettuce, and spinach.

(To confuse things, some of the so-called annual flowers that we grow in northern gardens live more than one year in warmer climates—but die in our cold winters, so we treat them as annuals. But actually, they’re not. A good example is fuchsia.)

Biennial

A biennial has a two-year life cycle. The first year, it makes leaves; and in the second year, flowers and seeds. In the veggie garden, a number of common crops are biennials, but we usually harvest from them during the first year. Parsley, Swiss chard, and carrots are examples.

Botanical Name (Scientific Name, Latin Name)

This is the official two-part name, often italicized. Useful when we want to make sure there’s no confusion around what plant we’re dealing with.

Common Name

This is the everyday, plain English name. The only problem is that sometimes the same name gets used on more than one plant. Bluebell is a good example. That’s why, when in doubt, you can check the Botanical Name to make sure you’re ordering what you want.

Cotyledon

This is the name of the first leaves that emerge when a seed germinates. You might see this word when seed shopping because transplanting guides often talk about “seed leaves” or “cotyledon leaves” when explaining when to transplant your seedlings. They look different from the “true” leaves that come afterwards.

Many common garden crops are biennials. Parsnip (seeds at the top) is a good example of a biennial in the vegetable garden.

Cultivar

This word comes from “cultivated variety.” It just means a variety intentionally grown by humans. People often use this term interchangeably with “variety” although there are also naturally occurring plant varieties—which is why the distinction. If you see a name between single quotes (‘ ‘) it’s likely a cultivar name. A cultivar can be an open-pollinated or a hybrid (see below).

Days to Maturity (Days to Harvest)

An approximate number of days until harvest. This number is always approximate because many things (weather, growing conditions, the stage of harvest) have an effect on it.

For crops we plant directly in the garden, it’s the number of days from seeding until harvest; while for crops we start indoors as transplants (e.g. tomatoes) it the number of days from transplanting in the garden until harvest.

Dioecious

Dioecious plants have male and female flowers on separate plants. In the veggie garden, asparagus is an example of a dioecious plant.

Direct Sow (Direct Seed)

Pea seeds, an example of a crop that we usually direct sow.

This is when we plant seeds in their final, outdoor destination. Crops that are commonly direct seeded include root crops such as carrots, beets, as well as beans and peas.

Germination Rate

Seed companies test germination. (At least I hope they do!) If you see a percentage on a seed packet, it indicates the germination rate from a germination test—and this should give you an idea of what sort of germination you can expect at home under good conditions.

GMO (Genetically Modified Organism)

Many people understand this to mean a plant into which genetic material from another plant or life form is inserted. What’s confusing is that the way this term is often understood and the official definitions differ.

The exact definition depends on who you ask and where you are. Here’s the official definition used by the Government of Canada.

“A genetically modified (GM) food is a food that comes from an organism (plant, animal or microorganism) that has had 1 or more of its characteristics changed on purpose. Organisms can be modified by different processes, including: conventional breeding techniques, like cross-breeding or mutagenesis (a change in the genetic make-up of an organism caused by chemicals or radiation); modern biotechnology techniques, such as genetic engineering; gene editing.”

Here’s what can be confusing: The wordy definition above includes traditional breeding…the sort of breeding that might have given us some of our heirloom varieties. What many people want to avoid is “genetically engineered” seeds. Genetically engineered seeds are mostly found in commodity crops (think canola and corn) – and are not sold to home gardeners.

Harden Off

When seedlings are moved from protected conditions such as indoor grow lights or a greenhouse, they are “hardened off,” which means they are gradually acclimated to the brighter light, different temperatures, and wind outdoors.

Hardy Annual

An annual that tolerates some frost and cool conditions. For example, a common hardy annual vegetable is arugula—which, if you let it make seed, you’re likely to find growing up on its own in your garden while there are still cool conditions.

Heirloom

Like the word “natural” in the health food sector, “heirloom” is one of those fuzzy, poorly defined words that marketers adore. There’s no precise meaning. But, in general, it means an older open-pollinated variety.

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Hybrid Seeds

Hybrid seeds result from cross-pollinating two varieties with desirable traits. In the seed industry, it’s done in controlled conditions, so there’s no chance of an errant pollen grain giving something different.

Hybrid seeds tend to be more expensive because of the labour needed to make the cross. Hybrids are often made to have desirable traits such as disease resistance and vigour…and they’re also made because it’s an industry.

If you see the term “F1,” that refers to the first generation of seed after the cross. That’s usually what’s for sale at seed vendors. When you save seeds from a hybrid plant, it will probably be different from the parent plant.

Hybrids occur in nature too, but the hybrid seeds you find at vendors will have been deliberate. When people are new to seed shopping they sometimes wonder if hybrid has something to do with genetic engineering—and it doesn’t. It’s entirely different.

Last Frost Date (Average Last Frost Date)

The date in the spring when—on average—there isn’t any more frost in your area. It’s figured out using historical weather data.

This date is like a marker post for seed sowing. When a seed catalogue recommends starting tomato seeds 8 weeks before your average last frost date, this is what it’s referring to.

This date is also used when deciding when to move seedlings into the garden. (But remember…an average last frost date means that some years there is frost after that date.)

Monoecious

Monoecious plants have both male and female flowers on the same plant. Melons are monoecious; and if you look closely, you’ll see some of the flowers have little melons-in-waiting next to the female flowers, while the male flowers have none.

Open Pollinated (OP)

Open-pollinated bean varieties are easy to save seeds from because there is not usually much cross-pollination with other varieties.

Open-pollinated varieties are stable varieties that you can save seed from and get plants that are like the parent plants. Some open-pollinated varieties are heirlooms; some are recent.

Note: To get seeds like the parent plant, there can’t be “cross-pollination” with other varieties. Some types of plants mostly self-pollinate (they have perfect flowers, see below), so you’re likely to get seeds like the parent plant without doing anything special. But some plants have separate male and female flowers—meaning insects might pollinate them with pollen from another variety. Squash is a good example. In that case, open-pollinated varieties are grown in isolation when saving seed.

Organic

Generally understood to mean that the plants the seeds are harvested from are not treated with synthetic fertilizers and pesticides. The thing to keep in mind when seed shopping (food shopping, too, actually) is that there are organic certification bodies—agencies that make sure a producer adheres to a set of standards. So you might come across seed that a seller says is organic—but is not “certified” organic.

Parthenocarpic

This refers to varieties that can make fruit without pollination. The resulting fruit has no seeds. You’re most likely to see this term as you browse cucumber varieties.

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Pelleted

Sometimes small or irregularly shaped seeds are coated with clay to make them easier to handle or dispense with seeding equipment. These “pelleted” seeds are usually more expensive.

Perennial

A plant with a life cycle spanning a number of years.

Perfect Flower

A flower that has both male and female parts.

Set

Onion “sets” are small, pre-grown onion bulbs that you can plant directly in the garden instead of growing onion seedlings. It’s a great option if you don’t have a lot of indoor space for growing onion transplants.

Tender Annual

An annual plant that does not tolerate frost. We usually start tender annuals indoors, in warm conditions, and then transplant them outdoors when there is no further risk of frost. A good example of a tender annual is basil…which quickly wilts in protest in cool weather.

Transplant

The word we sometimes use to refer to the little seedlings that we start indoors. Of course, it’s also the act of replanting—transplanting—the little seedings. So both a noun and a verb!

Treated Seed

If you’ve ever seen a pink pea or bean seed, it’s been treated with a fungicide. That treatment is done to prevent rot in cold, wet soil. If you don’t seed that’s treated, look for “untreated” seed.

Untreated Seed

Seed that has not been treated.

Crop-Specific Lingo

Beans

Bush bean plants are shorter, and tend to have an earlier and briefer period of harvest. Depending on the variety, they might or might not need support.
Pole and runner beans get quite tall, and will need support. The harvest is later, and the harvest period is longer.

Peas

Vining pea varieties, like runner and pole beans, get quite tall and have a longer harvest window.

Squash

Bush squash are compact (at least for a squash plant!).
Vining (running) squash have long stems that spread far and wide.

Tomato

Determinate (bush, patio) tomato plants get to a certain size and then stop growing. They are relatively compact, and flower and fruit in a shorter time. Even thought they are compact, they are not self supporting—so if you like your tomato plants off the ground, use a stake or a cage.
Indeterminate (vining) tomato plants keep growing and making fruit as long as conditions permit. They get very tall if the growing season permits. (This is the sort of tomato used in greenhouse tomato production here in Ontario: Plants are grown up twine, and as they get taller and taller, the twine is lowered and the base of the stem is coiled on the ground.)
There are also semi-determinate tomato varieties.