You might find some info in this thread.

Plus there are lots of discussions here from Wall o' Waters users too, some with photos.

Wall-of-Waters discussions

They do a good job of protecting the plant but you would still have to insulate the containers too.

Have you had good luck growing 2 indeterminate plants in one Earthbox? I know many do it with 2 determinate varieties but 2 indeterminates can easily over-crowd an Earthbox. And Sungold? Not an OP and even 1 Sungold in an Earthbox would be over-crowded. It is a HUGE plant with a huge rootball.

I assume you know that some of your listed plants are not considered early varieties.

Dave

Nitsua,

Thank you! I was reading that thread right after posting this. I think I'll give several of those ideas a try.

Dave,

Thank you! The past three years I've grown Sungolds in five gallon buckets to keep them to a manageable 5 foot size. I know it's a hybrid. That's just my favorite two cherries. Any suggestions for other cherries that might be earlier?

This is my first year growing in earth-type boxes, I've done in ground and in 5-10 gallon buckets before with good success. (One plant per bucket). It's just another experiment to see if I can get an earlier tomato! The boxes are made from black totes so they heated up pretty quickly this spring. So I don't think they will need extra coverage on the totes themselves. I may have to shade them or wrap them in foil this summer depending on how hot they get.

Early tomatoes that are not really early...do you mean Jaune Flamme and Paul Robeson? I believe both of those are over 70 days but I've read good things on them doing well set out early with protection that's why I included them. :)

My experience with the Early tomatoes last year (2014.)

Early tomatoes - B.I.G. disappointment

Late season tomatoes ripped BEFORE early season tomatoes

Too EARLY to call but so far CP is the star performer heirloom in my garden. Nothing comes close.

Sey

CP was on my list for this year.

personally i would much rather invest my time and money into some indoor lights for a head start.. with a 250-300W HPS/MH fixture i can grow 2-3 pretty large tomato plants or more if they are under 2 feet tall. heck, in 30 days i grow a 4 foot tomato plant in hydroponic then i take off many cuttings and have them ready (rooted) for outdoor transplant which gives me a real head start. i've had outdoor cutting transplant explode and go from flower to already starting to fruit in about 30 days. i think the "fastest" way to get ahead start in the season is to take clones from a mature plant, you get fruit very early..

I tried to grow CP this year. But I only had a seed left and it didn't germinate. I bought some more for next year though!

It's working pretty well for me! I am getting many of my first fruits now, far earlier than last year. I found the varieties I started the earliest, matured the earliest in most cases. It seems to have less to do with the variety. Stupice shows no signs of maturing a fruit yet, because I planted it later.

Below are the first Black Krim (left) Cherokee Purple, and below Jaune Flamme and my first red cherries. This pic was taken this morning. I have been getting yellow & orange cherries since June 10. One very early cherry is Gold Nugget, it also has a nicer flavor than yellow pear IMO.

My other favorite heirloom is ANANAS NOIRE ( aka black pineapple). But it is late this year, so far. It i was much bigger than CP last year.

Sey