Where to Buy Marijuana Seeds in California

California allows both medical and recreational cannabis, and adults can grow a limited number of plants at home. That raises a common question: where can you buy marijuana seeds in California?

There are options online and in licensed stores, but you should still choose carefully. Seed quality, germination rates and the legal rules all matter.

In this post, we'll cover your options for California cannabis seeds, what the law allows, and popular strains that suit the state's climate.

Online Seed Banks That Ship to California

Online seed banks offer a huge variety of High-THC cannabis seeds and ship to customers across the US, including California.

Know the legal picture before you order. California's Department of Cannabis Control says you cannot take cannabis across state lines, because cannabis is illegal under federal law.

Seed sellers have relied on the federal hemp definition to ship seeds. Under P.L. 119-37, though, the new federal definition excludes viable seeds from cannabis plants above 0.3% total THC, with parts of the change taking effect in late 2026. Seeds from high-THC strains are not hemp under that definition.

If you still choose to buy online, here's what seed banks typically offer:

• Large selection: Online seed banks carry far more strains than most local stores.
• Convenience: You can browse and order from home.
• Discreet shipping: Reputable seed banks ship in plain packaging.
• Strain information: Good seed banks list genetics, typical effects and growing difficulty.
• Customer reviews: You can read other growers' experiences with each strain.
• Grower support: Many seed banks offer customer service and growing guides.

Below are two seed banks we like.

I Love Growing Marijuana (ILGM)

ILGM is a long-running online seed bank with a reputation for reliability.

ILGM carries a wide range of cannabis seeds, from classic strains to newer hybrids.

You'll find feminized seeds, autoflowers and high-CBD strains, so there's something for most growers.

ILGM advertises a germination guarantee. Read the terms before you order so you know what's covered.

ILGM also publishes grow guides and tips on its website for beginners and experienced growers.

It ships in discreet packaging.

Herbie’s Seeds

Herbie's Seeds is another well-known online seed bank that ships to US customers.

Herbie's carries seeds from many different breeders, so you can explore a wide range of genetics.

It ships internationally, which gives growers access to genetics from around the world.

Whether you want European classics or strains from other continents, Herbie's has a broad catalog.

Herbie's is also known for responsive customer service.

Licensed Stores in California

You can also look for seeds in person. Only buy from state-licensed cannabis retailers, which you can verify through the Department of Cannabis Control. Not every licensed store stocks seeds, and selection is usually smaller than online.

The biggest drawback of local stores is limited selection.

Many carry only a handful of strains, so growers looking for specific genetics may have a hard time.

California also has many unlicensed retailers. Unlicensed shops aren't held to state testing and safety rules, so avoid them.

Prices in physical stores can also be higher, since rent and overhead get passed on to buyers.

The Legality of Marijuana Seeds in California

California has been at the forefront of cannabis legalization in the United States. It was the first state to legalize medical marijuana, in 1996 through Proposition 215.

Then, through a ballot initiative in 2016, recreational cannabis became legal in the state.

Adults can also legally grow cannabis at home, within limits.

Before buying seeds and growing, know the rules.

Under the Adult Use of Marijuana Act, you can grow up to six plants. However, they should be for personal use and must be grown away from the public view.

Cities and counties can add their own rules for home grows, and local laws may be stricter than state law.

Federal law is different. Marijuana remains a Schedule I controlled substance outside the narrow medical categories the Justice Department moved to Schedule III in April 2026.

Is it Legal to Buy & Grow Cannabis Seeds in California?

Under state law, yes, adults can buy cannabis and grow it at home within the limits above.

The safest route under state law is a state-licensed cannabis retailer. Out-of-state online seed banks are not licensed by California, and shipping across state lines raises the federal issues described above.

You must be at least 21 to buy cannabis for adult use. For medical use, adults 18 and older with a physician's recommendation qualify, and a physician can recommend growing more than six plants.

Should You Grow Weed Indoors or Outdoors in California?

Good seeds are only the start. Where you grow your plants matters just as much.

Choosing between indoor and outdoor growing is one of the biggest decisions. Here's how they compare.

Indoor Cannabis Cultivation

Indoor growing gives you control over the environment.

You can keep temperature, humidity and light steady, which helps in areas with unpredictable weather or extreme heat.

That control lets you grow year-round, with multiple harvests a year, instead of one outdoor season.

Indoor growing also keeps plants out of public view, which state law requires.

It also lowers the risk of pests and diseases, since you control what comes in.

Grow tents, carbon filters and other odor control tools help keep smells contained.

Outdoor Cannabis Cultivation

California's climate makes outdoor growing attractive. Outdoor plants get free, abundant sunlight.

Sun-grown cannabis can produce large, flavorful harvests.

Outdoor growing is also cheaper, since you don't need grow lights or climate control equipment.

That makes it a good option for growers on a budget.

Outdoor plants have more room to grow, which can mean bigger yields, especially for tall sativa strains.

It's also lower-impact, since you're not running lights and fans.

Many growers believe sun-grown plants develop richer terpene profiles.

Remember that outdoor plants still need to be hidden from public view.

When to Sprout Weed Seeds in CA

The best time to sprout seeds depends on your region and strain.

For most of California, spring, from about March to May, is a good time to start seeds for an outdoor grow.

Once the risk of frost passes, your plants get a head start on the long growing season.

In warmer areas such as Southern California, growers can also start some plants later in the season.

Some strains struggle in intense heat, so choose heat-tolerant varieties for hot inland areas.

Indoors, you can start seeds any time of year.

A stable indoor environment allows year-round growing.

Best Strains to Grow in California

There are plenty of strains to choose from. Here are a few that suit California growers. THC levels, yields and flowering times vary with genetics and growing conditions, so treat seller figures as estimates.

1. Trainwreck Feminized Cannabis Seeds

​Trainwreck, a sativa-dominant hybrid, is known for strong, fast-hitting effects.

A Northern California classic, it has a piney, spicy aroma with a touch of lemon.

Buds grown from Trainwreck seeds are known for a potent, euphoric high.

Trainwreck's origin story is part legend. The popular tale says Northern California growers named it after a nearby train wreck, but it's hard to confirm.

Trainwreck feminized cannabis seeds produce female plants with sturdy stalks and are suitable for growers of all levels.

Plants can grow tall and wide, so regular training or trimming helps manage their size.

Trainwreck grows well indoors or out, and its hardiness makes it a favorite with growers.

CHECK PRICE AT ILGM

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2. Gorilla Glue #4 Autoflowering Cannabis Seeds

In your search for the best cannabis seeds in California, Gorilla Glue #4 is worth a look. It's known for a potent high that can overwhelm inexperienced users.

This autoflowering version is a balanced hybrid with high THC.

Gorilla Glue #4 Autoflowering seeds grow famously sticky buds that leave scissors gummed with resin.

The Gorilla Glue #4 auto-flowering strain finishes quickly without light cycle changes. It grows indoors or outdoors.

CHECK PRICE AT HERBIES

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3. Sour Diesel Feminized Cannabis Seeds

Looking for an energetic high? Sour Diesel cannabis seeds, also known as "Sour D," are a classic choice.

This sativa-dominant strain has a sharp fuel aroma and an upbeat reputation.

Sour Diesel‘s exact lineage is uncertain; it's a mix of legend and speculation.

These feminized seeds produce female plants. With good care, they can give a solid harvest indoors or out.

Outdoors, Sour Diesel likes sunny, dry, warm weather. Indoors, it does best under strong lights in a controlled environment.

It has a fairly long flowering time indoors, so Sour Diesel feminized cannabis seeds suit patient growers with some experience.

CHECK PRICE AT ILGM

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Conclusion

Wondering where to buy marijuana seeds in California? I Love Growing Marijuana (ILGM) and Herbies Seeds are our top online picks for selection and service.

Online sellers offer wide selection, detailed information and discreet packaging, but shipping across state lines carries federal legal risk. If you buy locally, stick to state-licensed retailers.

Choosing seeds is only the start. You'll also need to decide whether to grow indoors or outdoors and give your plants the right conditions.

Read Also: Where to Buy Marijuana Seeds in New York

Frequently Asked Questions

What are the top marijuana seed banks in CA?

I Love Growing Marijuana (ILGM) and Herbies are popular online seed banks that ship to California. Both are based outside the state, so they are not California-licensed retailers.

Is it legal to buy seeds in CA?

Under California law, adults 21 and older (or 18 and older with a physician's recommendation) can buy cannabis from licensed retailers. Federal law still treats marijuana as a controlled substance, and taking cannabis across state lines is illegal.

Is it legal to grow your own weed in CA now?

Yes. Adults 21 and older can grow up to six plants at home, and local rules may add limits. If you want to grow and sell cannabis, you need a state cultivation license.

How many marijuana plants can you legally have in CA?

You can legally grow up to six cannabis plants at home for personal use. Medical patients can grow more if their physician recommends it.

Read Also: Where to Buy Marijuana Seeds in Illinois

Sources

• What's legal, California Department of Cannabis Control
• Changes to the Statutory Definition of Hemp and Implications for Agricultural Policy, Congressional Research Service
• Justice Department Places FDA-Approved Marijuana Products and Products Containing Marijuana Regulated by a State Medical Marijuana License in Schedule III, U.S. Department of Justice