Welcome to UK420

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more!

This message will be removed once you have signed in.


Owderb

Rockwool Blocks

51 posts in this topic

Quite frequently on the boards I see seedlings and clones that have just been transplanted into rockwool cubes looking a bit grim so I thought i'd put a guide up on how I used to prepare my cubes, and what worked for me

I think bad preparation of the said cubes could be the main reason why some plants struggle. If you prepare your cubes correctly then at least if you do get problems you can rule this out

1. Soak your blocks, whether 1" or 6" in 5.5-5.6ph water for 24hrs, preferably with an airstone

2. Squeeze out most of the excess water, but not too hard that you damage the cube

3. For clones soak for another 24hrs in a weak nutrient mix with an ec of 0.6-0.8, ph 5.8, and your choice of rootstim

4. For germination(1" blocks) I just soaked for a second time with a rootstim, no nutes, ph 5.8

5. When you use the blocks, a light squeeze to leave the block 60-70% wet and you are ready to go. This way you shouldnt overnute them, the ph will be in balance, and drowning them shouldnt happen because leaving blocks sopping wet especially with seedlings can cause damping off

6. Leave the plastic wrapper on to stop the blocks collapsing

Hope that helps and clears a few things up for you

Owd

Edited by Owderb
5 people like this

Share this post


Link to post

Thx Owdherb , i didnt do this and my ladies took ages to start . Will do this on my second attempt.

p.s nice piece on supercropping , ive got small stumpy ladies , bushy as hell and im getting sweating on the leaves so i dont want rot r owt so just building up the courage to attack with the scissors :yinyang: .

Edited by Owderb

Share this post


Link to post

could watered down clonex be used as a root stim?

Share this post


Link to post

n n n no. Canna rhizotonic is a good root stimulater and used on all mediums ie rw cubes.

Hantshaze.

1 person likes this

Share this post


Link to post

looks like another trip to the GS i almost bought some when i bought the spreader mat but would have probably left that there to and come home with just a single pipette(like i did)

Share this post


Link to post

WOW lol:rofl:

Been looking all morning for this info and when i return you have posted it all, good stuff Owd :rofl:

Share this post


Link to post

you know i've copied and pasted this in my ever growing hydro info doc if thats ok?

thanks

Share this post


Link to post

Nice post Owderb and simple to follow.

From my experience I have noticed that .8EC of organic mix burnt 2/3 of my clones and 1.9EC of GH nutes was just fine. So my conclusion is that the strength is product dependant. Also the strength of 1.9 is not needed for clones.

A question for you, do you soak cubes in any nutrient mix prier to transplanting? (for ex. 1” into 3”or4”)

Share this post


Link to post

what about rockwool slabs..... whats the best way to prep them?........ anyone

Share this post


Link to post

If it were me then i'd be finding a container to fit them in and do exactly the same or use the bath :)

Owd

1 person likes this

Share this post


Link to post

Nice post :) ,

Thanks for the info.

Mrm :)

Share this post


Link to post
Squeeze out most of the excess water, but not too hard that you damage the cube

I put them in a colander inside a bucket. I then swing the bucket around 10 times so that the water drains out of the cubes by centrifugal force.

I find this helps maintain the shape of the cubes (provided I'm careful) and drains them uniformally.

Seems to work...

Stan

1 person likes this

Share this post


Link to post

i was recently given a bottle of jump start advanced nutes

its does the job but havent used Canna rhizotonic yet!

Share this post


Link to post
Quite frequently on the boards I see seedlings and clones that have just been transplanted into rockwool cubes looking a bit grim so I thought i'd put a guide up on how I used to prepare my cubes, and what worked for me

I think bad preparation of the said cubes could be the main reason why some plants struggle. If you prepare your cubes correctly then at least if you do get problems you can rule this out

1. Soak your blocks, whether 1" or 6" in 5.5-5.6ph water for 24hrs, preferably with an airstone

2. Squeeze out most of the excess water, but not too hard that you damage the cube

3. For clones soak for another 24hrs in a weak nutrient mix with an ec of 0.6-0.8, ph 5.8, and your choice of rootstim

4. For germination(1" blocks) I just soaked for a second time with a rootstim, no nutes, ph 5.8

5. When you use the blocks, a light squeeze to leave the block 60-70% wet and you are ready to go. This way you shouldnt overnute them, the ph will be in balance, and drowning them shouldnt happen because leaving blocks sopping wet especially with seedlings can cause damping off

6. Leave the plastic wrapper on to stop the blocks collapsing

Hope that helps and clears a few things up for you

Owd

Have you tried the peat disks soak them in willow water to expand them put them in a block tray and into the prop work every time.. no need for rooting hormone to make willow water soak willow cuttings in water 24 hrs. do not store always us fresh. .happy horticulture. eric

1 person likes this

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now