Cannabis Seeds Sink Or Float

ILGM

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I threw some seeds in a cup yesterday and they all floated, I thought they were supposed to sink. The seeds are nice and hard and look just fine. Aren't… Just curious if it makes a difference as far as if the seed is good or not if it sinks or floats? ok so I germinated my last batch of seeds with the cup of water thing.. anyways, my last ones sunk… n these once wont sink lol… does it matter

Should seeds float or sink.

I threw some seeds in a cup yesterday and they all floated, I thought they were supposed to sink.

The seeds are nice and hard and look just fine.

Aren’t they supposed to sink?

Dignan
The Soapmaker!

They’ll sink when they absorb the water through their shells. If a seed is still floating after 2-3 days (stir the water to be sure surface tension isn’t to blame for keeping it afloat before you toss it in the garbage), then the seed is likely not viable.

Once they sink, go ahead and put them into paper towels or into your sprouting/growing medium of choice.

Hindu Killer
Active member

Seems I read in a old Ed Rosenthal book that either dead seed sinks and live seed floats, or live seed sinks and dead seed floats.

bounty29
Custom User Title

LOL Hindu, so a dead seed either floats or sinks and a live seed either sinks or floats?

A lot of people throw them in a shotglass to start germination, and then when they sink they’ll put them into soil or sometimes paper towels until they’ve got a small taproot, and some people leave them at the bottom of the shot glass until they’ve got a small taproot, but everyone does it differently.

Paddi
GanjaGrower

I do mostly, and then in soil.

phate
Well-known member
Hindu Killer
Active member
DirtDevil
Active member

The seeds sunk after about a day. Usually I just do them in wet paper towels this was the first time I actually tried germinating in just water. It actually seems faster. Some had tap roots at 3 days.

little j
Member

slightly off topic but sense we are here talking about seeds. we all know a good mature seed is dark, maybe spotted. just look at all the pics the seed sites have of turtle shell looking seeds. so, i bought my first batch and many of the seeds are greenish or plain jane looking but not particularly what i would say a mature seed looks like. i know that they can all pop to be a plant but i thought the standard (according to the site pics) was dark spotted etc. a couple were like this in each batch but i was surprised. any thoughts.

DirtDevil
Active member
frostynugs420
Member
DirtDevil
Active member
Jochsmokes
Member

i did both this year direct planting in peat pellets and water germing. i don’t know why but the directly planted seed seem to be devloping leaf sets quicker and has passed the water germed seedlings under same light? does this seem crazy? i know their the same strain so it just puzzled me

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hempybucquet
Member

Mine sunk like a rock, cracked within 24 hours, taproot unfurled up and was ready to plant the next morning. It has been about 24 hours, see if they have cracked and then plant them tomorrow morning into your seedling pots with the taproot pointing down!

Does it mean amything when seeds float vs sink?

I don’t think the good egg/ bad egg rule applies here. Never tried germinating my seeds in a cup of water.

GoinGreen09
Member
Dirtyboy
Well-Known Member

Soak them for 24 hrs and plant them sink or float or regardless how they look.

Float or sink they may still grow.

RichED
Well-Known Member

dont throw a non floater away i have a few steps
1- underwater first night on heating pad in dark most split then to soil
2-dont slit then soak under peroxide overnight slit to soil
3-dont slit pour off liquid leave between napkins for abup to a week to split and go to soil
4-dont split after week start scarcification includes sandpaper picking pieces of husk off scraping the little cover over seem off and fanal dont like to do but have done succesfully must be carful not to injur inside has a high success rate is to split with exacto knife at seam easy easy

for finish stages at about 99 5 success rate after step 3 at about 75 % after step 3 i feel like nothing to lose and actually improve percentages step 4 has a lot to do with how i feel but always get better numbers after if i have to go that far

growone
Well-Known Member

i had always heard that sinkers are the good seeds, takes a while for good ones to sink, usually a few hours
all my sinking seeds have germinated

RichED
Well-Known Member

i dont do float thing at all i use bottom of beer cup about 1/2 of it then trace folded paper towel till it opens like a book cut out put bean in it i have a tarced piece of terry cloth i use one on bottom to hol mois terry on top keeps it below water anyway nekt day if not split take off top terry pour out water leave in moist paper towel on top of moist terry to hold moisture no need to keep misting all the time

seeds in a cup of water, supposed float or sink?

I leave them in there for like 12 hours and then if all haven’t sunk I tap the tops and the sink. I think they are supposed to sink so the can absorb the water.

RastaCourage
Well-Known Member

that’s how i germinate my seeds
someone posted a ‘how to germinate’ thread
& i told him how to do it exactly
but, you leave them in there for at least 24 hours
& if they don’t sink, take your finger & twirl the water around the seed
if it still hasn’t sunk then leave in there for another 12 hours

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but, you need to keep them in a warm dark place
like place larger over your cup filled half way with the seed inside
like you can throw it in your growbox or whatever

they don’t need to pop/crack like others do it
once it has sunk it can sprout ones that don’t wont
like the ones that don’t sink after 12 hours..

after it has sunk take a pair of tweezers & plant it knot side up
& put a piece of saran wrap over the cup you plant it in
& turn the lights on for your schedule ( 18/6 24/0 ect )

then they will sprout in less than 3 days

Eharmony420
Well-Known Member

sonds good but i did not understand “knot side up” to clarify place the “taproot” pointing down, thats the piece sticking out. Use sterilized tweezers and stay clean. Is is easy as cake.

RastaCourage
Well-Known Member

EDIT: the knot side up is the stubby part of the seed
& the pointy side goes face down into the soil
you should plant it 1/3 of the soil down

it’s no bullshit because i do it that way lol

– my computer is acting up.. my reply got posted twice..

RastaCourage
Well-Known Member

the knot side up is the stubby part
& the pointy side goes face down

it’s no bullshit because i do it that way lol

Eharmony420
Well-Known Member

i do it that way too. basically, i was stumped on a few hard to crack girls until i used the glass of water. I just have been sitting here dazed over a cup of coffee at what the know side is. Thought i would say it in my launguage, no probs, reps all around.

Bangers999
New Member

You cant fail with putting in toilet roll (wet) folding over and keep moist and warm (in the dark) easy. buy a propagater its the best start they can poss get, i keep my spray bottle in the prop aswell keeps the temp the same, if they get a chill when young they can turn male as the females dont like it and can turn male (fact)
you want to keep them warm and moist when babies also all water when feeding at the start should be 24hrs old, as in its been out the tap 24hrs.

RastaCourage
Well-Known Member

haha it’s all good, it works really well
i’m just not into the whole paper towel method..
i just don’t like it for some reason..

are you currently growing? link me.. lol
i would like to see your grow, if that’s okay with you..

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topfuel29
Well-Known Member

that’s how i germinate my seeds
someone posted a ‘how to germinate’ thread
& i told him how to do it exactly
but, you leave them in there for at least 24 hours
& if they don’t sink, take your finger & twirl the water around the seed
if it still hasn’t sunk then leave in there for another 12 hours

but, you need to keep them in a warm dark place
like place larger over your cup filled half way with the seed inside
like you can throw it in your growbox or whatever

they don’t need to pop/crack like others do it
once it has sunk it can sprout ones that don’t wont
like the ones that don’t sink after 12 hours..

after it has sunk take a pair of tweezers & plant it knot side up
& put a piece of saran wrap over the cup you plant it in
& turn the lights on for your schedule ( 18/6 24/0 ect )

then they will sprout in less than 3 days

I do it exactly as you’ve been doing it. Except I add (1) step,
after they’ve sunk I put them in a moist paper towel (I don’t waste my time on the ones that haven’t sunk), and put that in a zip-top bag (making sure all(or)most of the air is out), and back on-top of the water heater. I can USUALLY get seeds to germinate 36 to 48 hours. If there not sprouts by then I let them go for another 24. if they don’t sprout in 72 hours I toss them. The way I see it is seeds that sprout with in a 48 hour window are going to be healthy plants.
Why I like to do it that way- You can see the root growth, then I class sprouts as to there length of growth. It helps me in deciding where to put that sprout (space is at a premium) usually the sprouts with long root growth are the taller faster growing plants. Some-times those sprouts are males (if you have non-fem. seeds)
I use distilled water in my germination. I don’t know if it helps or makes any difference. Thats just how I roll
The next time I germinate I’m going to make a Willow Tree solution.
I read about taking willow tree branches and cutting them up into 2-3 inch pieces and letting them simmer (not Boil) in a pot of warm water for a few hours.
Theres a chemical in the willow tree the promotes rooting. The Willow Tree solution was intended for cloning, but why not try it for germination.

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