How to find a great, ecologically friendly nursery?

What should I look for in a plant nursery as far as ethical, ecological, organic methods and practices.

Are some nurseries better than other in this regard and how to I find the good ones?

I live in New York City. I want to find plant nurseries close by or somewhere between here and Boston.

You could do a search for Nurseries that sell organic or a search for Organic Nurseries.  
Most nurseries don't grow their own plants but rather have them shipped in.
If you find one that does grow what they sell, you usually have to buy in quantity, at least around my area that's the case.
We have some commercial growers of nursery plants but you have to buy enough for a market garden if you want to buy direct from them.
In some areas, you might even need a tax number to qualify for buying from them.
This makes it hard to know for sure how the plants were grown unless the plants carry the USDA Certified Organic label on their packaging.

That's us!   We are at https://www.facebook.com/foxgreenfarm/ if you are into Facebook and our retail site is https://www.jiovi.com.  There are others but not many and most have, over time, gone out of business.  I don't know why except that it is much more expensive being in business than I expected at first.  There is the farmer mentality of seeking out the very best deal which transfers to trying to offer the products of the farm cheaply too.  This can easily lead to a negative balance sheet which eventually catches up with you.  
I started over 10 years ago with a love of seaberry plants (hippophae rhamnoides).  I was still working in the corporate world and it was a hobby.  I chronicled my experiences and new knowledge on a blog which was well received, literally across the world.  Not that it was super awesome but I think people just understood it was a passion and appreciated it.
Currently and to the question.
We are Certified Naturally Grown.  I have looked into "Organic" certification and see the marketing advantages but the cost and intrusiveness is just, so far, not something I have determined to be worthwhile.  CNG is a similar system to Organic but is a peer review system and much less expensive to participate in.  We follow all organic practices.  
We ship all over the country from central Maine.  Our focus is on cooler weather plants and seeds.  Right now we have about 60 items, over half of which are live plant materials.  Check us out on Facebook or brows the retail site.  Send an email with any questions, I'd be happy to answer them.  --Tom

hau Tom, I know a couple of people who started Organic certified nurseries, they went bankrupt fairly fast. I think it is mostly because of the up front expenses along with true lack of interest.

I have used "store bought" started plants, the thing is, even if they aren't certified when you buy them they will become organic certified as you, the organic grower, grow them into production size. This is allowed by the USDA Organic rules, a reason I don't bother with it.
We grow our produce with no herbicides, pesticides, or anything else that I would not want to have in my own food. We get raves from customers about taste and texture.

Redhawk

Hello Eric,
There are several local nurseries and farms that we use here in Brooklyn, NYC and the US depending on species and specialty.
Thanks,
Mar,
Please contact.  Waiting to hear...