Johnmerr would you happen to know?

It takes a while. You can withhold food and water to hasten hardening and you can bring the trees into a predominantly shaded area. This works well. My problem is my trees really start to grow in September to October. Average first frost for me is late October and not enough time to harden. My tree must come in or go under glass. Withholding fertilizer can be northing more than a total root flush and light watering. you will need to bring the tree into shade for under watering or sun will dehydrate your tree fast.

Steve

Stick,

Never measured it; but seems like about 6 weeks for my garden trees.

Thank you guys, my plan was to continue fertilizing (1 tbsp foliage pro per gallon every 2-3 days) until 10/1, then I was going to reduce fertilizer to 1/4 tsp per Gallon from that point forward at every watering. During the winter months I water on average 1 per week.

The perfect ratio is 5-1-3. Can you find a 1-1-3 for winter time. I'll keep my Eyes peeled

I don't know how long / old the growth needs to be before it's considered hardened. But, I stop feeding my in ground trees in august because I have found any new growth in September and later gets toasted in a late November/ early December freeze(s).

Thanks, George. That is real experience; and that is what most of us here are looking for.

thank you all for your information and advice.