What Do Good Cannabis Seeds Look Like? Color, Shape and Firmness

Good cannabis seeds are usually dark (gray, brown or black, often with tiger stripes or mottling), teardrop-shaped and firm when you squeeze them gently between your fingers. Pale green or white seeds are immature, and seeds that are flat, cracked or soft are less likely to sprout. Every grow starts with a seed, and not all seeds are created equal, so here's how to separate the good ones from the duds.

At first glance, a good seed should simply look healthy. To spot quality weed seeds, you need to know what shape, color and size you're looking for, though none of these traits guarantees a successful germination.

With so many strain genetics out there, healthy cannabis seeds can vary a lot in how they look.

Signs of Healthy Cannabis Seeds

Dark Color

Healthy seeds are usually gray, brown or black, with darker spots and lines that don't follow any particular pattern. Good seeds can be a single solid color or show tiger stripes or tortoiseshell patterns in different dark shades.

The seed coat can also look waxy, catching the light when you hold it up. Keep in mind that color varies with strain genetics, growing conditions and how the seeds were stored. For example, seeds can darken after several months in storage.

Size and a Teardrop Shape

Size and shape alone won't tell you much about seed quality. High-quality cannabis seeds can be small or large, and if a small seed checks the other boxes, it can still be a great seed.

As for shape, good seeds tend to look like a teardrop, rounded on one end and pointed on the other. Seeds that don't have this shape are generally less likely to be viable.

Young Seeds

Age is a useful clue to seed quality, but it can be hard to know how old a seed is. In general, seeds under a year old give you the best shot at a successful harvest. Younger seeds germinate faster and are less likely to get damaged during short-term storage.

Growers can keep seeds in the fridge for several years to stretch their shelf life. Still, planting them while they're relatively young tends to give better results overall.

Don't know how old your seeds are? Here's a quick way to estimate it: gently squeeze the seed between your thumb and index finger. The younger and healthier the seed, the firmer it'll feel.

Signs of Bad Cannabis Seeds: What to Watch Out For

Green or White Color

If your seeds are pale green or white, that's a red flag: it means they never fully matured.

Low-quality seeds can also look dull and flat in color. Green cannabis seeds usually come from plants harvested before the seeds had time to ripen, and planting these light-colored seeds often ends in failed germination.

Irregular Shape

Healthy cannabis seeds come in all shapes and sizes, but there are still a few ways to tell whether a seed is any good. The ones without a teardrop-shaped body are less likely to produce a solid plant. Flat or deformed weed seeds may fail to germinate or grow into less-than-ideal plants.

Old Seeds

Older, less viable seeds can feel slightly soft or spongy. The worst ones may even crack under pressure, because they hold less moisture and fewer nutrients than young seeds.

If seeds crack, break or have dents, you can assume they're low quality. Most of the time, how the seed was handled before you bought it makes all the difference. And sometimes it just comes down to luck.

How to Test Cannabis Seed Quality

The float test:

If you're wondering how to tell whether a weed seed is good, there's a classic test: drop the seeds into a glass of lukewarm water and leave them for about one to two hours. Seeds that are still floating aren't the best quality, while the ones that sink to the bottom are the stronger candidates. Just know that once seeds soak up water there's no going back, so only use the float test right before you plan to germinate.

The float test also takes a little patience, since the results aren't instant: you'll need to wait roughly 1-2 hours before you can call it. On top of that, some perfectly good seeds need time to absorb enough water to sink.

Only do this test if you're going to germinate the seeds right afterward. Viable seeds that sink have taken on water, and that water crossing the seed coat is the signal that it's time to wake up and start germinating.

Sorting your seeds by quality saves time and money. Starting a grow with quality seeds means better germination rates, better genetics, bigger yields, better aroma and flavor, and better buds all around.

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