Cannabis Seeds: Genetics, Types and Storage

Cannabis Seeds: Genetics, Types and Storage

Every cannabis plant begins as a seed, and the seed decides more than most people realise: the sex of the plant, how it reacts to light, how tall it grows, and the mix of cannabinoids and terpenes it can produce. Choosing well at this stage avoids months of lost effort later. The market has expanded enormously, and https://budweedseeds.com currently lists 400 strains from breeders around the world. This guide covers the main seed types, how to read a strain description, what distinguishes a good seed from a poor one, and how to store and start them properly.

What You Are Actually Buying

A cannabis seed is a tiny, hard-shelled embryo enclosed in a protective coat. Mature seeds are usually brown, grey or tiger-striped, solid to the touch and slightly glossy. Inside sits everything the plant needs to start: a root tip, two cotyledon leaves and a reserve of nutrients to fuel the first days of growth.

Genetically, each seed is a one-off combination of its two parents, and that is why two seeds from the same pack can grow noticeably different. Breeders reduce that variation by stabilising a line over many generations, but some spread is expected in any seed-grown crop. Clones are the only way to get identical copies; seeds trade that certainty for vigour, a strong taproot and the chance of a exceptional plant.

Three Seed Types, Three Different Grows

Nearly every seed on sale falls into one of three categories, and the choice between them is the most important decision a buyer makes.

• Regular seeds give male and female plants in about equal numbers. They are favoured by breeders and by growers who want to produce their own seeds, though they require identifying and removing males before they pollinate the females.
• Autoflowering seeds contain ruderalis genetics that cause the plant to flower on age rather than on light cycle. They are smaller, faster and more tolerant of imperfect conditions, usually at the cost of yield and potency.
• Feminized seeds are bred to yield female plants almost every time. For anyone growing for flower rather than for breeding, they remove the guesswork and the lost space of male plants.

Feminized and autoflowering are not mutually exclusive: most autoflowering seeds sold today are also feminized, and the label usually says so. Regular autoflowering seeds exist but are uncommon.

Males: Asset or Liability?

For the bulk of buyers the answer is feminized. If the aim is flower, every male plant is room, light and weeks spent on something that will be discarded, and a single missed male can seed an entire room. Feminized seeds avoid that issue completely.

Regular seeds earn their place in a few situations. Breeders need males to provide pollen. Growers who want to hunt for a keeper from a large population frequently prefer the wider genetic variation of regular stock. And some old-school lines are simply sold in regular form. Outside those cases, paying for seeds that are half male is difficult to defend.

Light-Driven or Clock-Driven?

Photoperiod plants stay in vegetative growth as long as they get long days and switch to flowering when the light falls to around twelve hours. That hands the grower control: vegetate for two weeks or two months, shape the plant, then trigger flowering when it suits the space.

Autoflowers ignore the light schedule and flower on a clock set by genetics, usually a few weeks after sprouting. The whole cycle from seed to harvest is shorter, the plants remain small, and they can be grown under long light from start to finish. The trade-off is that mistakes cannot be corrected by extending veg: a stressed autoflower remains stunted. Beginners, balcony growers and anyone with limited height often do well with autos; growers after maximum yield from a given footprint usually choose photoperiod stock.

Numbers on the Pack, Explained

A seed listing contains a lot of information into a few lines, and most of it is more useful than the strain name.

• Flowering time. For photoperiod strains this is counted from the light flip; for autos it is usually given as total time from seed. Confirm which convention the breeder uses.
• THC and CBD ranges. Stated figures are from the breeder’s own tests under ideal conditions. Treat them as a ceiling, not a guarantee.
• Sativa, indica or hybrid. Today almost everything is a hybrid; the percentages point at growth habit (height, internode spacing, flowering time) more than at effect.
• Lineage. The parent strains tell you what to expect in smell, structure and temperament far better than any marketing copy.
• Yield estimates. Given per square metre indoors or per plant outdoors, and heavily dependent on the grower. Treat them to compare strains from the same breeder, not across breeders.

A Quick Viability Check

Appearance is a loose guide to viability, not a verdict, but a few signs are worth knowing.

• Colour. Brown, tan, grey or striped seeds are usually mature. Pale green or white seeds were picked too early and rarely sprout.
• Size. Larger is not better; seed size varies by strain, and some top genetics produce small seeds.
• Shell. A hard shell that does not give under light finger pressure is a healthy sign; seeds that collapse easily are non-viable.
• Float test. Dropping seeds in water and discarding floaters is common but unreliable: healthy seeds often float until the shell takes on water.

Keeping Seeds Alive in the Drawer

Cannabis seeds stay viable for years if they are kept properly and for months if they are not. The threats are warmth, light, moisture and change.

• Keep them dark. Light breaks down the embryo over time, so an light-proof container is better than a clear one.
• Keep them cool. A steady temperature in the fridge range slows the seed’s metabolism without damaging it; the freezer is risky unless the seeds are fully dried.
• Keep them still. Shifting seeds between warm and cold repeatedly does more harm than either temperature on its own; take out the container as rarely as possible.
• Keep them dry. A airtight container with a desiccant packet stops the humidity changes that trigger premature germination or mould.

Getting a Taproot

Each grower has a preferred method, but the essentials are the same whichever you choose: moisture, warmth, darkness and air.

1. Place the seeds in room-temperature water for up to a day to soften the shell. Longer and they can suffocate.
2. Move them to a moist paper towel within a closed container, or directly into a small pot of light, damp medium. Keep the temperature in the low-to-mid twenties Celsius.
3. Wait. Most seeds show a taproot inside two to five days; some need a week or more.
4. Once the taproot reaches about a centimetre long, plant it root-down, just below the surface, and give gentle light as soon as the seedling emerges from the surface.

Touch sprouted seeds as little as possible; the taproot snaps easily and a broken one frequently stops the seedling permanently.

Where the Seeds Come From Matters

Seeds are only as good as the source, and the difference between a serious seed bank and a reseller of unknown stock appears in germination rates, not on the website.

• Pack options. Multiple pack sizes allow you to try a strain before committing; Bud Weed Seeds offers packs of 3, 5 and 10 seeds on most lines.
• Original packaging. Seeds should ship in the breeder’s original packs, not repackaged in a plain bag.
• Storage on their end. Check how stock is kept. Seeds sitting in a warm warehouse for a year lose viability before they reach you.
• Clear policies. Shipping regions, packaging, and what the seller does when seeds fail to germinate should all be stated in plain language.
• Breeder transparency. A trustworthy seller names the breeder for every strain. Bud Weed Seeds stocks lines from Barney’s Farm, Dutch Passion and Royal Queen Seeds, among others, with the breeder named on each product page.

Delivery, Packaging and Replacements

Bud Weed Seeds ships to the EU, the UK and Canada. Orders are dispatched in plain packaging with no reference to the contents on the outside.

Seeds come with a germination guarantee: if any seed fails to sprout within 14 days of delivery when germinated by the recommended method, Bud Weed Seeds sends a replacement for it. The claim requires the order number and, in most cases, a photo.

Before You Order: The Rules

The law on cannabis seeds is distinct from the law on cannabis itself, and it varies sharply by country. In many European jurisdictions seeds are sold legally as souvenirs or for hemp purposes, while germinating them stays illegal. In other places both buying and growing are allowed under licence or within personal limits, and in some countries ownership of seeds alone is banned.

Bud Weed Seeds does not send orders to the United States, where importing of cannabis seeds is restricted. It is the buyer’s duty to check the rules in their own jurisdiction before ordering, and nothing on this page should be read as legal advice.

Still Wondering?

Does Bud Weed Seeds stock CBD-only strains?

Yes. The catalogue includes high-CBD lines with negligible THC, marked as such on the product page, alongside balanced and THC-dominant strains.

Why did a seed fail to sprout?

The commonest causes are over-soaking, cold, a medium that is too wet or too dry, and damage to the taproot during transplanting. Genuinely dead seeds are less common than grower error.

How long do cannabis seeds stay viable?

Kept cool, dark and dry, most seeds sprout reliably for two to three years and often far longer. Left in a warm drawer, viability drops noticeably within a year.

Are autoflowering seeds less potent?

Modern autos are far closer to photoperiod strains than early ones were. Harvests per plant are still smaller because the plants are smaller, but potency in good lines is comparable.

Can I tell the sex of a seed by examining it?

No. Claims based on shape, ridges or the crater at the base have no scientific basis. Only feminized breeding, or waiting for the plant to show preflowers, tells you the sex.