Green Mountain multiplier onions

Harvested the Green Mountain multiplier onions yesterday. I have questions!

background:
Started them February 2025 from seed purchased from Experimental Farm Network.
Planted in a raised bed July 2025.
Overwintered with hoops and frost blankets.  
We are zone 7b southern NJ coast US

So 22 seedlings made it through the weird winter. Some threw up scapes; most did not.
As you can see from the photo, I have around 40 bulbs. Some are red. Most are white.
I'm drying them now.

So here are my questions:
I'd like to hold back some bulbs to replant. I use the side shoots, right? The smaller bulbs?

Should I put them in at the end of July again to over winter?  

Thanks for the advice!

It is my understanding that you plant the cloves from the cluster of smaller bulbs.

Hi RobinJo, I think you may have harvested earlier than necessary?

I started them from seed from Experimental Farm Network this year...
https://store.experimentalfarmnetwork.org/products/andys-green-mountain-multiplier-onion

My understanding is that you harvest after the tops have fallen over and turn brown. My tops were still green but mostly fallen over and I just couldn't wait any longer. I will plant some in late October when I plant garlic to see if they will overwinter in zone 4b. I will save the rest to see how well they store and plant the survivors in spring.

Here is a link to another thread with some photos and good info.
https://permies.com/t/382078/alliums/Potato-onion-harvest-breeding

I suspect that whenever you put yours back in the ground that some will make it and you can just keep going. Pretty sure you can just plant any of the individual onions no matter the size.

Harvesting when tops are still partially green is such a common trap with alliums. Easy to get impatient after months of waiting. Interesting that yours threw up scapes from some and not others from the same planting, wonder if that's just natural variation in the population or something to do with which bulbs overwintered better.