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Bad cannabis seeds can ruin an entire grow. Here's how to spot them early and save yourself a whole lot of time and effort. Germinating marijuana seeds. How to germinate cannabis seeds (shot Indoor). Marijuana weed seed germination. Germinating cannabis seeds is the first step in a successful garden. Marijuana seeds can be germinated in a number of different ways. This shot Indoor seed germination method is easy and works quite well.

How to Spot Bad Cannabis Seeds [Comprehensive Guide]

You may not realize it, but the quality of your cannabis crop is, in part, determined before you have even begun. Seed quality is an enormous part of growing, so it’s vital to source marijuana seeds from a reputable company.

Sometimes, you can end up with ‘bad’ cannabis seeds that will cause problems later down the line. In some cases, these seeds just won’t germinate. Although this won’t ruin your entire crop, it is a waste of time and money, which can be frustrating.

Today, we will help you work out whether your cannabis seeds are good or bad. Hopefully, this guide will help you to determine which seeds are worthy of your time and which ones are duds.

EDITOR’S CHOICE – Homegrown CannabisCo

Homegrown CannabisCo are the masters when it comes to seeds. Offering a massive variety of cannabis seeds that are well categorized, not only does this company create a resource for superb quality options including feminized seeds, it also provides extensive growing information for those looking for some support along their journey.

What Makes a Cannabis Seed ‘Bad’?

A ‘bad seed’ is any cannabis seed that will cause problems. In some instances, this means a dud seed that never sprouts, wasting your valuable time and a few resources. While dud seeds aren’t damaging, they are irritating.

Another type of bad seeds is male cannabis plants. There’s a 50/50 chance with regular seeds as to whether any given seed is male or female. The problem is that male plants will pollinate the females once they reach maturity, destroying the valuable THC content of female plants.

Having male cannabis plants in your garden is basically a recipe for disaster, so you want to avoid it at all costs. By the way, here’s how to figure out if your plants are male or female.

One way around this is to purchase feminized marijuana seeds. In theory, all seeds in a feminized bunch will be female – unless you buy from a disreputable grower. Unfortunately, there’s no way to tell whether a plant is male or female simply based on the seeds.

This guide will only cover how to tell the difference between a potent seed and a dud seed.

The complete guide…

How to Test Cannabis Seeds

There are several easy methods for testing cannabis seeds. Most of them can be performed before germination, saving you some time and resources. Let’s find out how to check your seeds.

Method #1: The Sight Test

Cannabis seeds are surprisingly beautiful. They have a mottled brown appearance with patches of light and dark, and sometimes gorgeous tiger stripes. The seeds are also quite shiny if you view them close enough.

Sometimes, you can tell if a seed is good or bad just by looking at it. Here’s how to spot a healthy seed:

  • Coloration: A dark coloration with black or gray patches is a sign of a healthy seed. Conversely, white or green seeds are unlikely to germinate because they are not mature. Pale seeds are also more likely to be old and ineffective.
  • Waxy coating: Healthy seeds have a waxy, shiny coating. If it doesn’t, then the seed is likely a dud
  • Cracks: Cannabis seeds should not be cracked. If your seed has cracks in it, it’s probably best to discard it.
  • Shape: The rounder and fatter the seed, the more likely it is to sprout into a healthy plant. Some growers are concerned about large seeds with thick shells but don’t worry. The shell will break down with water.
  • Mildew: Grab a magnifying glass and view the seeds close up. A white, dusty powder is a sign of powdered mildew, which means the seeds have a fungus and should not be planted.

In some instances, you can crack the seed open and see inside if you can’t tell anything from the outer shell. An oily inside with a musty smell means that the seed has gone bad. Similarly, black inside the seed means that it’s fermenting. Again, it won’t germinate in this instance.

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Method #2: The Touch Test

The feel of cannabis seeds is another good indicator. Hold the seed between your thumb and forefinger and give it a light squeeze. Don’t apply too much pressure – just enough to test its integrity.

If the seed cracks under slight pressure, then it’s unusable. It’s likely to be past its sell-by date.

Strong seeds, however, have a better chance of germinating and growing into a healthy plant.

Method #3: The Water Test

Are you still unsure about your cannabis seeds? You can always do a floating test to see if they’re healthy. By the way, this method works for numerous plant seeds and not just cannabis.

Disclaimer: Don’t perform this test unless you’re ready to germinate the plants right away. The water could damage the seed and ruin a perfectly healthy plant if you dry it out afterward.

For this test, you will need a cup, glass, or bowl of warm water. It should be quite warm, but not hot. It also works best with spring water or distilled water.

Add your seeds to the water, and then wait for 1-2 hours. Those that float on the surface are bad seeds that are unlikely to grow, whereas the seeds that sink are probably healthy.

This method is a great way to check your seeds because it’s low effort. You can also test multiple seeds at once, and it’s really cheap and easy to do.

After you’ve done this test, you need to germinate the healthy seeds. At this point, they will have absorbed water, which can damage the seed if you don’t germinate it at this point. Incidentally, germination is the final test for your seeds.

Method #4: The Germination Test

If all else fails, it’s time to germinate. You might have no idea whether your seeds are healthy but attempting to grow them is an easy final test that will separate good seeds from duds.

There are multiple ways to germinate, including planting the seed directly in soil and seeing if it sprouts. This is a pretty ‘old-school’ method, but sometimes, it works.

More commonly, growers use the paper towel method. Dampen a paper towel, ensuring it isn’t soaking wet. Place this on a kitchen plate and put the seeds on top, then put another plate upside-down on top. A moist, dark, warm environment allows the seeds to sprout. Check on the seeds once a day; after germinating, you should see a white taproot emerge.

At this point, you can transplant the seed into its pot. Use a pair of tweezers and handle each seed carefully, being careful not to touch the taproot. The taproot is fragile and may break if you’re not delicate; furthermore, touching it with your hands may contaminate it.

After germination, you’re good to go. Remember to check back as the plants mature to make sure you haven’t got any male cannabis plants.

Waste not, want not!…

How to Buy Good Cannabis Seeds Every Time

It’s recommended to buy feminized cannabis seeds to eliminate the possibility of males ruining your crop. Even so, some subpar retailers will advertise feminized seeds, only to sell regular cannabis seeds.

It’s vital to buy from a reputable seller that you trust. If this is your first time, read reviews on the seed banks to find out what other customers thought. If lots of buyers were disappointed by low-quality seeds, avoid that company!

Unfortunately, you might still get some bad seeds sometimes. Plants are living beings and can be a bit unpredictable – even the seller might not be aware that some of their seeds are duds. With any luck, the majority of seeds you buy will be healthy and good to go.

The sign of a bad seller is that their seeds are consistently old, dead, and covered in powdery mildew. That said, don’t be too harsh on a seed bank if a couple of their seeds don’t work from time to time when they’re generally reliable.

Final Thoughts on Good and Bad Cannabis Seeds

Telling good and bad cannabis seeds apart is not an exact science. Sadly, you don’t know what’s inside the seed beyond its appearance, so you won’t know what the plant is truly like until you start growing it.

Cultivating marijuana is a bit of a learning curve, so don’t worry if you mess up your crop from time to time. It will only get easier with time.

Hopefully, you can now tell apart some seeds, at least, giving you more opportunities to create a successful grow.

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EDITOR’S CHOICE – Homegrown CannabisCo

Homegrown CannabisCo are the masters when it comes to seeds. Offering a massive variety of cannabis seeds that are well categorized, not only does this company create a resource for superb quality options including feminized seeds, it also provides extensive growing information for those looking for some support along their journey.

How to Germinate a Cannabis Sativa Seed

The following is a successful step-by-step process for germinating cannabis seeds on any budget. Germination of marijuana seeds, cannabis sativa, & pot seeds with minimum failure.

Always be sure that your work area is clean. This includes YOU. Wash your hands every time before working with seeds – it will increase your success.

Germinating Marijuana Seeds

Preparation & Supplies

In preparing to germinate your cannabis seeds whether one or a dozen, make sure you have everything you need and that it is also CLEAN. I use anti-bacterial soap in my garden for myself mostly, I recommend using it for everything (hands, buckets, tweezers, shot Indoores, etc.).

Pre-soaking Method
(shot Indoor method)

For our tutorial, we are using a shot Indoor, mineral water at room temperature, and our chosen seed(s). We use masking tape and a black marker to identify our seeds when germinating multiple cannabis strains.

You can use your local water with one caution. Fill a pitcher with your water 24 hours before using it & leave it open. This allows chlorine and other potentially harmful chemicals to escape into the open air.

Cannabis Seed Germination

Day One

Half fill your Indoor with mineral water. We have taken a single seed (female), and placed it in the water (shot Indoor). Notice that the seed is initially floating.

We have identified this seed and now we need to put it away in a warm and dark place for 24-30 hours. This allows the seed to absorb water. The seed does not need or like any light yet, but likes everything warm.

The cannabis seed simply needs warm air, moisture and darkness to begin a good germination process.

Keeping a temperature of between 75 to 85 degrees Fahrenheit is excellent for starting seeds. Warm, wet and dark is what they like.

Select a warm spot that stays consistent in the temperature it offers (like on your water heater). We cover our Indoor with a dark cup to keep out all of the surrounding light.

Again, leave this covered and warm for at least 24 hours. This will allow the seed to absorb water, and is an excellent indication that the seed can grow.

The cannabis seed sinks when it absorbs water (24 hours). When you return the next day and uncover your Indoor, you may notice that the seed sank to the bottom.

If it did not, have no fear. Try stirring the water with your clean finger. The seed may have absorbed water and still be afloat by a bubble or dry spot (happens all the time).

How to Germinate

Day Two

If the seed still floats, you can add some fresh water* and check back again in 8-12 hours. After that, you can still plant the seed, but chances are slimmer that it will take hold (germinate).

I then take a cup of my personal grow mix (soil) that is the same mix I use in my plants through-out their maturity.

I only transplant once, and it’s moved into the same exact grow medium in it’s final container. This prevents additional shock or stress when transplanted.

Each time you change containers or transplant, it will make the plant stress for a week or so.

Use a humidity dome until the seeds break ground (already germinated).

I use a solo cup and slice four slits in the bottom for good water drainage and added aeration. It also makes the transplant very easy.

I carefully place the seed into the soil with the knot side up. I only place it about 3/16″ under the soil surface and water thoroughly. I am still only using water* at this point.

When I water* the soil, it tends to move some soil over the seed. I label my cup and place it in a dome for high humidity and added warmth (shown next to a clone). Position a small grow light above the dome and have the timer the same as your 18 hour garden clock. We want some air, moisture, warmth and light right now.

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Lights should remain ON for 16 – 20 hours and OFF for 4 – 8 hours. You are deciding this right now, because changing this light cycle in mid-growth IS stress for the plant – we will control the lights completely. This is the ‘trigger’ for future growth stages. I recommend 18 hours ON, 6 hours OFF once germinated.

Germination

Day Three

Keep the soil moist, but not wet. there is a difference. After my initial watering, I do not water* it again for 2-3 days, and then I am spraying water* over my cup of soil.

Usually, in about 2-5 days you will see the seedling begin to pop out of the soil. I have seen seeds take 11 days, but usually less.

Sometimes, as in this example, the seed shell stays attached while the seedling works it’s way upward and fights to exist.

Cannabis seed curling upward with seed shell still intact.

Spray the leaves with water* for two days to help transition from the high humidity dome. Don’t water yet, just spray them.

Germinating marijuana seeds

Day Four

Once the seedling has broken ground and I can see green leaves, I remove the cup from the humidity dome. Move your new baby to the nursery side of your garden with the 16-18 hour grow light cycle and circulating air.

As the seed uncurls and begins it’s beautiful life, it will lose the seed case and begin to sprout it’s first leaves.

As you can see, the sprout stretches upward while wrestling with the seed casing to be released (all this work for our smoking pleasure).

As it spends more time under the light, the sprout should be able to shake the seed and begin to form it’s first 2 leaves (cotyledon).You will find that once you have a regiment down that works, it’s fairly easy to germinate your cannabis seeds indoors at any time of the year.

Congratulations! We have now moved from the germination stage to the seedling stage. Patience, cleanliness and good soil products can help insure a high percentage of germination success with your marijuana seeds.

Germinated Cannabis Seed

First Week (Seedling)

Your new seedling is alive and prospering. In our example, you can leave it in the cup for a couple of weeks while it gains strength. It has everything it needs to begin a stress free life. From here we move into the caring and growing of your marijuana.

At times, I plant more than one seed to a cup. Sometimes I leave them both in the cup, and sometimes I separate them immediately after they break ground.

You should now be on your way to some wonderful romance with your plants.

Do not be afraid to “talk to” and raise your youngsters to be strong, vigorous and ‘stinky’ young ladies.

Be careful not to over water* your seedlings. Wait for the top of the soil to get dry and crusty before you consider watering again.

Water* – In this Chapter, the term water relates to mineral water, distilled or bottled water, or house water that has sat in open air for 20-30 hours.

Giving the seedlings a mild nitrogen mixture in your water* will help vigorous, healthy growth at this stage (if your soil does not compensate in this important area). Be careful! They are still young and very impressionable.

Once your seedling has 5-7 growing days in the cup, you can transplant it anytime to it’s larger container. Make this large enough for the life of the plant (I use 5 gallon containers) I never want to run out of room (soil) at the point of flowering.

I recommend water* throughout this process because my soil mixture contains initial nutrients like nitrogen, phosphates, guano, seafood, and more. At some point, you’ll probably develop your own soil too.

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