The New Grobo Start

I said it once before and it’s worth repeating.

Once your seedling has a tap root that has hit the water in the Start, you should remove the wicks. Otherwise the wicks will continue to pull up water into the peat pod and it will not dry out.


So far so good.


I have a couple problems with the Grobo hardware going on but Danielle, Bruno and the gang have been in constant contact. It’s a manual process right now but fingers crossed I can keep her alive.


Oh by the way, the pictures above are a transplant, day 1 of late veg.


Hope you can get the hardware issue resolved soon! That’s a nice big plant being transferred!


Hey everyone! I have some advice on the Grobo Start:

My little pod holder that I use while doing the drain/fills:

I think it is a shot glass. I pull one pod to access the reservoir for the drain/fills. Also, I think the instructions for the Start need to be updated regarding the Fill Float. If you fill up the unit all the way so the Fill Float is flush with the lid, there is too much water and your peat pod will be submerged. This will result in the peat pod being too wet and possible damping off issues. Check out the appropriate fill level:

This is an example of the water being filled all the way so the Fill Float is flush with the lid. Note how you can see the water coming up thru the empty peat pod. Too much water!

Also, it’s important to note that while the instructions call for 650ml of water you may need less since the volume of the seedlings’ roots will displace the water and take up space. So I think it is best to add your water to the Start and visually inspect where the water line is in relation to the bottom of the peat pod holder. Once you find the sweet spot, mark a line on your Fill Float so you know when it’s properly full. Like this:

I actually overfilled her a little bit (or I didn’t account for the displaced volume once I put the 3rd seedling back in it’s spot. You can see the peat pods look wet again :frowning:


Awesome tips! Thank you! I see that you’re still using the ties as support :joy:. I decided to transfer mine to the Grobo and use the support rack.


@Aang - Yep still going strong in the Start with these 3. In the Grobos the Purple Haze auto will be harvested this week so I will transplant one seedling soon. The other grow, the jamaican dream needs a few more weeks so I’m growing out her replacement - jamaican pearl - in the Start.

So I will transplant 2/3 of the seedlings into the Grobos. One seedling is being kept back to fully grow out to harvest or death in the Start, whichever comes first. It’s kind of an experiment to see what will happen…I know the Start is not designed to carry a cannabis plant from seed to harvest but I’m curious to see how it goes!


Awesome, sounds like you have a good plan :). Would love to see updates on how the the seedling does in the Start from the beginning to harvest/death lol


Hi @miami5th …I’m running the same experiment to see how long a grow can go in the START… I recently changed the lighting schedule to 20 hours light (via manual turn ONs). I don’t think one can finish a complete grow in the START and I did not want to witness a death… so I just bought the cheapest 3.5 gallon space bucket that I could find online and going to give growing outside the grobo shot with my light source being the START…i’m mostly focused on improving my 2nd grobo grow ever but will give this experiment a cheap try in a space bucket.


I’d love to see results of growing with the Grobo start light. I’d never thought about that and it seems like a great idea. Please keep us posted!

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So far my cilantro has been in over forty days!
Cilantro left side = seed
Mint right side = from supermarket/dirt (added much later)


What was your transplant method for the supermarket mint?


I took it out of the pot it came in and removed the dirt then ran it under water to clean residual dirt chunks off.
I used the grobo start peat pod by making the hole big enough to get the roots all the way through so that it was touching water right away.
Other than that ijust made sure to do it when I was changing into fresh water and nutes! :eyes::seedling:




Wow. That’s a lot of broken glass decor.


Not broken! I cut every piece! Broken mirror ruins the backing and turns it into partially clear glass! :eyes::seedling:


Good lord. I get pissed if a bottle of wine is too much work to open.


Lol! I have my entire dining room in glass! :eyes::seedling:


Where can one find this odor mod box I see?