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Volume of water for seedlings?

ballplayer 2

Active member
Hi ladies and gentleman. I know this is one of the most newb questions one could possibly come up with. However, I am having serious issues trying to start seeds.

I am relatively experienced and cannot believe the problems I continue to have simply getting seeds off to a strong start. When I was having good success with starts, I dont remember having to pay special attention with the amount of water I was giving them. I just remember keeping them somewhat moist until transplant to 4 inch containers. I have always used peat based mixes, typically sunshine mix#'s 1 or 4.

I suspect my two main problems have been overwatering and starting seedlings under lights that were too intense. I have been practicing with veggie seeds for quite sometime now, I dont want to waste precious seeds. I currently have a round of tomato seedlings that germinated last week. They are growing more slowly and misshapen than I would like.

When my last round got burned they were very yellow with whitish/black tips on the cotyledon leaves, and red veins, yellow true leaves. Cotyledon leaves were also stunted. ALL leaves displayed purple leaf undersides.

My current seedlings appearance has improved since starting them under much less intense 18" fluorescents. The cotyledon leaves have reached regular size and maintained decent color. The true leaves on my seedlings have also kept a decent color green. However, 2 out 4 seem to have misshapen true leaves. The true leaves are smaller and seriously misshapen. However, even the less misshapen seedlings look on the brink growing slowly, and possibly on the verge of trouble.

My water is clean and the correct pH. My meters are calibrated and have good accuracy. I mix RO water with tap until the ppm reaches 100 (on a 640 ppm scale).

I can only deduce that the problem I have is overwatering. I try to let the containers reach the approximate weight they were when they contained only dry mix. However, I think I may have overwatered on the first watering after germination. I tried to water only a minimum, but ended up watering until most of the mix in the container was saturated (just short of runoff). The problems seem to have been exacerbated since that watering.

2 are in small paper dixie cups with holes punched for drainage. 2 others are in a 6 cell seed starter. I cannot seem to find the sweet spot as far as volume of water appropriate for these size containers. I know I have used far less than a shot of water to water each seedling. However, it seems the mix is still about fully saturated. Guess seedlings dont need much light or much water to get off to a good start.

Should I just basically use a small pour, or dribble around the stem of each seedling every so often until it gets big enough to start needing more water (perhaps 2-3 weeks down the road)? Watering until runoff does not seem to work in my spaces. At least not until the plants get a good rootball established and get going under the HID's.
 

ibjamming

Active member
Veteran
mix in a LOT of perlite...that will help with root drowning from lack of O2...up to 50% if you can't help but to water frequently.

Be SURE your pH is good. Get some drops to double check your meter. Too high a pH can kill a seedling quicker than shit. Twisted leaves are a good sign of pH problems.

Seedling stage is the toughest IMO...you'll get it. But over watering and too high a pH are the biggest killers...for me anyway.

Good luck!
 

old toby

Member
a humidity dome helps a lot with seedlings to get em started. i water my seedlings with a spray bottle-so i dont overwater.:tiphat:
 

the gnome

Active member
Veteran
I mix my seedling 50/50 FF OF to perlite,
very lite and airy and the roots just rip through it.
its almost impossible to over water and drown the roots with a mix this lite.
I think the two biggest beginner mistakes starting out seedlings is soil mix too heavy and a
overwatering, the two kinda go hand in hand.

always know the ph of the water your using
 
O

OrganicOzarks

I have to admit that I have always had problems with seedlings to. I have a new round going, and I am going to try the 50/50 mix. I think this will help out a lot. After the plants get out of their seedling stage everything else is easy. Hell I can clone with 100% success rate, but those damn little seeds are the hardest thing to get going well.
 
11! - definitely 11!

showphoto.php


https://www.icmag.com/ic/photo_popu...prod=photopost&ins=link_thumb_2_orig&alb=all#

Seriously, when I germinate seeds, I just pop them about 1cm into the soil and then water once, until the soil is damp.

The soil will stay damp for ages until the seedlings really get going, at which point I water them again. The soil will only dry out too fast if the environment is too warm and breezy.

I get about a ninety percent germination rate this way and all my plants survive.

Chill a bit - don't love your plants to death! :ying:

PS I give up trying to insert images into this silly bulletin board!
 
If you have good soil and a good container its hard to over-water as the excess will just drain out. Try different soil and use real plant containers. The water should pour straight through the soil in a little container. I have been adding coco to my soil. its cheap comes in a huge bale and drains great.

Also don't let the container sit in water. i know this is the problem with the 6 cell seed starter
 
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D

Danny-boy777

I see now said the blind man...

I see now said the blind man...

Thank you all for being honest :)

I have been experianceing the same issues and a very experianced friend pointed out 2 things to me..

the first question he asked me was How do you germ,Im aware this is an oldish post but someone can use this know how.

Paper towel till there is a long Tail just before it would be popping out of the soil type thing.

Plant it tail down,sprinkle soil over so that is east to pop out and follow the perlite instruction,

This method for me always insure's a Dank little (hopefull) lady
no wilting seedlings and no failure. :)
 

Dankiam

Member
a humidity dome helps a lot with seedlings to get em started. i water my seedlings with a spray bottle-so i dont overwater.:tiphat:

yes ive been using my humid dome now one side clones other side seedlings keep humid at 83 and seedlings are goin faster than if not in dome.also use rapid rooters they help alot.transplanting at right time too once you have established good healthy roots is another good thing to get down.
 

Bull.

Member
So after i put the seed in soil when do i put it under light? what light? can i use 600w hps, if so how far away does it have to be? and i water very little at first?
 

flyer

Member
yes ive been using my humid dome now one side clones other side seedlings keep humid at 83 and seedlings are goin faster than if not in dome.also use rapid rooters they help alot.transplanting at right time too once you have established good healthy roots is another good thing to get down.

so how long or how big till they get, for you to take them out of a humid dome?
mine is about 5" is it too late to put them in a dome?

i alway thought you want air circulation in the room, is it bad for seeding??


So after i put the seed in soil when do i put it under light? what light? can i use 600w hps, if so how far away does it have to be? and i water very little at first?

i think a 600w is too much
i try putting mine under a 400mh 3ft away and they got burnt.. :(
now i put mine under t5
 

!!!

Now in technicolor
Veteran
Read the Germination Guide in my sig.

I wasted hundreds on seeds mainly due to rot. The key is to keep the medium MOIST but not WET. A rockwool cube should be wet but should not feel heavy.

I just germinated a few beans last night. Here's what I do in detail:

Medium is Rockwool, my fav medium for seeds/clones. Cheap, clean, sterile, very high success rate.

Peat pellets are excellent as well. Soil and coco work great too but make sure you add perlite and have drainage holes in your cups/containers.

Don't use paper towels to germinate—no pre-germination rituals. Don't do a water soak unless the seeds are a few years ago at least. The seed just goes directly into the medium.

First, make sure your hands are clean and you are not using surfaces or tools that were in contact with any plants or non-sterile medium (soil.) Anywhere near outdoor plants or tools used for outdoor plants should be avoided.

I use my kitchen top and make sure to heavily rinse my pH/TDS meters before use. I use tap water (I suggest you do as well. The chlorine helps.)

Soak rockwool cubes in pH 5.5 water with 200 ppm nutrients (and B vitamins if you have) for 5-7 minutes.

Take cubes out of water and let drain for a few minutes. Then shake off the excess water. Try not to give the cubes a squeeze as this ruins its air retention. Think of a centrifuge.

Now your cubes are moist but not heavy. Place 1 seed in each cube side ways, not too deep. Only as deep as the seed itself.

Take off a little piece of the corner of each cube and place it above the hole. Don't stuff it in. Just lightly sit it on top to retain moisture.

Leave under 2x 23w CFLs (per 9 cubes) about 6" away. Have a fan blowing near but not on the cubes (perhaps on the bulbs.)

Avoid HID lights. I used to think this would supercharge my seedlings haha

NEVER water until the cube feels like it's nearly dry. If the cube dries completely the seeds die, if the cube stays saturated for too long it will rot. Read that again. This is the key to success.

A humidity dome will result in rot. Avoid. Try to have a lot of fresh air near the cubes.

Keep at 72-80F - Worry less about temp and more about air circulation.

If the cubes are too wet on the bottom, don't sit them on a flat surface that doesn't wick (such as a plate.) Although I've had success doing this, I feel safer at least placing the cubes on a paper towel or perlite to avoid stale spots.

I avoid using anything that contains organics. I don't want to give rot anything to feed on.

My friend has 100% success using a cardboard box with 1x 23w CFL mounted to the top. He leaves the box open and has a fan circulating air in his room.
 
D

Danny-boy777

Hi Bull, once your seed has popped and has a little tail,pop him in your media(soil/coco/hydro) and put it under soft light do not bury it too deep like half a centimeter.a small fluro even a cfl desk lamp just untill its a bit taller with the fluro you can insure by keeping the light close that the nodes will stay close together.HPS is very hot and usuallly used only for Flowering so if you choose to use that the distance from the baby will be more than the fluro.I strongly suggest white light (MH/CFL/Fluro tube) for the seedlings and for veg.

Ahoy Jah be wit ya..
 
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