Yes, I've used small containers - the only issue I have is they dry out a lot quicker so I lost a few by not being diligent on checking every other day or two. Lessons learned?

I also have a very small shoot of Pistachio in a bud vase with roots a couple inches long now sitting in the kitchen windowsill. One day I will need to put it in a proper container so it can start growing.

I'd pot up the survivors into quart containers when they start rooting. There's a lot of range between those tiny compartments and gallons! You can punch large holes for drainage in other plastic containers if needed such as milk jugs, yogurt containers, etc. if you don't have quart plant pots.

if you need more buckets you can check construction sites for empty paint & drywall compound buckets. you'll have to clean them though. a lot of grocery store bakeries, dunkin donuts, & Costco give away empty frosting buckets. these are food grade & can be used to brine meats, etc. I use them to store honey. they mostly have 1 & 3 gallon buckets. botanical gardens usually keep a container on site for people to bring in used nursery pots for recycling. I've gotten lot of pots that way. some nurseries will give away used pots as well.

I was gonna say- buckets and pots are easy to find as keeping those small cells properly and evenly hydrated can be time consuming. You can dumpster dive around big box stores for pots and I have had several nurseries give me one gallon pots. Find a place to store your pots and never throw anything one gallon or larger away!

Thanks for the replies. I'm always on the lookout for containers and will try to some of the suggestions mentioned above. If the clippings in these small containers do root, would you think I need to get them in ground earlier than October because of the limited space for root development? Thank you

For optimum growth they need optimum conditions.

I wouldn't be able to keep them alive for a month in those tiny cells. They are shrubs . . .

I would put them in bigger containers before putting in the ground but that's me. If you do put them in the ground you might consider a protected bed to begin with to get them through the first year or two.

I added a few clippings to larger pots as a hedge against the smaller containers. I will provide an update on the smaller containers once I have more information. If they root, I will probably move them to the ground earlier than I usually do. Thanks again for the responses.

Update on this thread - surprisingly, I think every cutting survived in the small container. The larger containers did very well. I'm planning on getting these in the ground tomorrow. Hoping to find a shady spot and will probably cover with some mulch and leaves I would imagine the roots are probably bound up tight, so I'll try to loosen them up prior to getting them in the ground.