How to Choose Cannabis Clones: A Genetics-First Buyer’s Guide

Sixteen years running a seed bank has taught me one hard truth about clones: choosing the wrong one doesn’t cost you a plant, it costs you a room. A single bad clone can carry pests, mildew, or a hidden viroid straight into your garden and take down everything you’ve got growing. So choosing clones isn’t shopping. It’s screening. And you screen every one like it’s guilty until it proves otherwise.

This is how to choose cannabis clones the way a genetics guy does it — starting with what you’re actually buying, then what to inspect, then how to vet the source that matters more than any of it.

First, Understand What You’re Buying

A clone is a genetically identical copy of the mother plant it was cut from. Same DNA, same traits, same flaws, same everything. That’s not a detail — it’s the entire basis for choosing well.

Because the clone is an exact copy, two things are locked in the moment you pick it: its genetics and its health history. You are not buying potential. You are buying a specific plant’s past. Whatever that mother yielded, however she flowered, whatever she was carrying — you’re taking it home. There’s no growing your way out of it.

So “choosing the right clone” breaks into two jobs that are equally important:

1. Choosing the right genetics — the strain and phenotype that actually fit your grow.
2. Choosing a clean, healthy individual — a cutting that isn’t smuggling pests or pathogens.

Most guides only cover the second. Skip either and you lose. Let’s do both.

Match the Genetics to Your Grow

Before you evaluate a single leaf, get honest about what your space and skill level can handle. The best clone in the world is the wrong choice if it doesn’t fit your room.

Flowering time. How long does this cut take to finish? A 9- to 10-week sativa-leaning plant ties up your flower room far longer than a fast 7- to 8-week hybrid. If you’re turning crops or working with limited space, flowering time is a real cost.

Structure and stretch. Some cuts double or triple in height when you flip them. If you’re in a tent or a short room, a heavy stretcher will grow into your light. Know how the plant grows before you commit veg time to it.

Indoor vs. outdoor. A cut selected and proven indoors may not have the mold resistance to survive a damp outdoor fall, and vice versa. Ask where the mother was run and how she performed there.

Yield vs. quality, honestly. Everybody wants both. Ask what this specific cut actually delivers — a huge yielder with mediocre terps is a different plant than a boutique cut that gives less but smokes like a dream. Neither is wrong; they’re just different jobs.

Your experience level. Some elite cuts are finicky — nutrient-sensitive, prone to stress, demanding on environment. If you’re newer, pick genetics with a reputation for being forgiving. Don’t let ego pick your genetics.

The point: choose the genetics that fit your reality, not the ones with the loudest name. A famous cut you can’t run well beats a no-name cut you can — every time. Actually, reverse that. A cut you can run well always wins.

Inspect Every Clone Like It’s Guilty

Once the genetics fit, it’s time to physically screen the plant. Bring a jeweler’s loupe or a magnifier. This is non-negotiable — the things that ruin grows are too small to see with the naked eye. Here’s my checklist.

Undersides of the leaves. This is the first place I look and where trouble hides. Spider mites, russet mites, thrips, and their eggs live on the underside. You’re looking for tiny moving specks, fine webbing, stippling (little pale dots), or a bronzed, dusty look. Any of it — walk away.

Leaf color and pattern. You want even, healthy green. Red flags: yellowing, brown or necrotic spots, curling or clawing leaf tips, and especially a mottled, mosaic, or mismatched pattern across the leaf. Twisted, distorted growth is a warning sign for viral or viroid infection.

New growth at the tips. Healthy growing tips look vigorous and normal. Stunted, twisted, or abnormally narrow new growth can signal a viroid like HpLVd (more on that next). The newest growth tells you the most about what’s happening inside the plant right now.

Stem. Firm and sturdy. A limp, wilting, or mushy stem means a stressed or failing clone.

Roots, if you can see them. On a rooted clone, you want white-to-cream, firm roots with no funk. Brown, slimy, or foul-smelling roots mean rot — pass. If it’s rooted in a cube or plug, a few healthy white roots poking out is a good sign.

If a clone fails any of these, don’t rationalize it. There will be other clones. There won’t be another harvest if you import a problem into your room.

The One You Can’t See: HpLVd

Here’s the brutal part of choosing clones. The single biggest threat — hop latent viroid, HpLVd — often can’t be inspected out. It’s frequently latent, meaning an infected plant looks completely healthy. No spots, no wilting, nothing. The mother looks fine. The clone looks fine. You veg it, flower it, and the crop comes in stunted, low-potency, and weak on terps and trichomes. That’s “dudding,” and by the time you see it, it’s too late.

HpLVd spreads primarily through infected plant material and shared cutting tools — which makes clones the number one vector for it in the entire industry. You cannot see it, smell it, or grow it out. The only way to know a clone is truly clean is a PCR lab test on the mother stock.

This is exactly why inspection alone isn’t enough, and why the source you buy from matters more than any visual check you can perform. A clean-looking clone from a dirty, untested operation is a coin flip with your whole crop. Which brings us to the real decision.

Vet the Source Harder Than the Plant

The reputation and cleanliness of the source is the most important factor in choosing clones — full stop. A great-looking clone from a sketchy source is still a gamble. A clone from a clean, transparent operation with tested mothers is insurance. Here’s what to ask and look for.

• Is the facility clean? If you can see it, look. Debris, pest signs, crowded mother rooms, and general filth all travel home with your cutting.
• Do they run IPM? A real integrated pest management program tells you they take contamination seriously and aren’t just moving plants for cash.
• Do they PCR-test their mothers for HpLVd? This is the question that separates the pros from everyone else. A reputable source tests their mother stock and will tell you so. If they’ve never heard of it or dodge the question, that’s your answer.
• Can they name the genetics and history? A legit source knows exactly what the cut is, where it came from, and how it performs. Vague or shifting answers mean vague or shifting genetics.
• What’s their reputation? In this game, reputation is earned over years. Ask other growers. A clean track record beats a cheap price every single time.

Price should be near the bottom of your list. A cheap clone that carries HpLVd or russet mites is the most expensive plant you’ll ever buy, because it takes the rest of your garden with it.

Rooted vs. Unrooted, and Quarantine No Matter What

Rooted clones establish faster and are more beginner-friendly, but they cost more and — because they’re further along and often in media — they can carry more hitchhikers. Unrooted cuttings (snips) are cheaper and start cleaner in some ways, but you’re responsible for rooting them, which takes experience and a good environment.

Either way, do this: quarantine every new clone. Keep it completely isolated from your main garden for one to two weeks and watch it. Look for pests emerging, disease showing, anything abnormal. This single habit — never introducing a new clone directly into your keepers — has saved more grows than any spray on the shelf. Treat quarantine as mandatory, not optional.

Frequently Asked Questions

How can I tell if a clone is healthy before buying?
Inspect the undersides of the leaves for mites and eggs, check for even green color with no spots or mosaic patterns, confirm vigorous normal new growth, and look for firm white roots. Use a loupe. But understand that the most dangerous problem — HpLVd — often can’t be seen, which is why the source’s testing matters as much as your inspection.

What is the biggest risk when choosing clones?
Importing pests or pathogens into a clean room. Clones are the number one vector for both spider/russet mites and hop latent viroid (HpLVd). One bad clone can contaminate an entire garden, so screening the plant and vetting the source both matter.

Should I buy rooted or unrooted clones?
Rooted clones are easier and establish faster, better for beginners, but cost more. Unrooted cuttings are cheaper but require rooting skill and a solid environment. Either way, quarantine before introducing them to your main grow.

Are clones a better choice than seeds?
It depends. Clones give you a known, proven, female plant with no germination step, but they carry contamination risk. Seeds start clean and pest-free and let you hunt your own keeper. Many growers start from quality seed, find their standout, then clone that plant — getting the best of both.

Choose Clean Genetics From a Source You Can Trust

Choosing the right clone comes down to genetics that fit your grow and a source that keeps its stock clean. That’s exactly what we’ve built our reputation on. For 16 years, Seeds Here Now has curated breeder-direct genetics and clean stock so you’re not gambling with your garden. Browse our clones and seed selection and start with genetics you can trust.