I'm back online again

Dave I'm back now

Howard. All trees are dormant at -5F. the question is can a lemon tree ever adjust to those temperature and survive. That answer is also NO. You can increase its cold tolerance by slow growth and early hardening over caused by clayish soil, but not to the degree you need. You will only get a lemon down to z6b by mutations that survive the cold. In time you may get the lucky seed. The more seeds you plant the more chances you have. Right now the best you can do is a Harvey lemon grafted to Flying dragon rootstock. The FD rootstock produces better lemons than the lemons own roots could do and adds 5F colder tolerance.

I'm not going to use flying dragon root stock because it not lemon but a type of orange and that is a trifolata and that and that is not the genetics I want so must make true lemon hybrids to get what I want

It takes a few years before seedlings grow big enough to resist cold. If you leave your seedlings outside till temperatures drop to 10F you will separate the winners from the losers. When that winning tree gets to be about 5 feet tall it may take down to -5F. You don't want to waste time on the losers so expose them soon so that they die.

Steve

And one tree had a growth powdere d egg cheese shells

Are you now putting powdered eggs and cheese in your medium???

I got 1tree to start a minor growth spurt by adding powdered egg shells

I'm adding powdered egg shells with lemons peels ground up together and one responded with minor growth spurt

Ponicirusguy6b452xx lm not going to use flying dragon genetics for that an orange not a lemon and it's a trifolata and I don't want that type of genetics and grafting on different root stock for that Is not the way I want to go for that is the lazy way is grafting and It doesn't keep it genetic true to get what I want.