My suegra used to use them, she said it was organic, perhaps they have changed due to costs? You may want to call.
About lack of selection -- TalloVerda and QuintaFresca offer only what is in season. And a lot of things just plain don't grow here -- are not native to Argentina. Blueberries for instance, they are everywhere at home, here no, and they are fragile, and if the weather conditions are bad your whole crop is gone, therefore they are very expensive. By the way, Argentina is also experiencing the worst drought in 50+ years or something like that.
I think you need to find new verdulerias, because at my verduleria --
Strawberry season was at it's peak very early this year as November was roaring hot. Cherries are in now but they are also slowing down.
Best right now are the white and yellow peaches, and ciruelas
Pink Grapefruit you can get pretty much throughout the year as they produce their own and then import Israeli ones during the fall/winter.
Blueberries were up until about December, now if you want them you'll have to check Jumbo to see if they have frozen ones, or else be content with paying an arm and a leg for a 1/4 pint.
Moras (blackberries) and frambuesas (raspberries) have a very short season and are always ridiculously expensive; I usually just buy mine frozen instead.
Damascos (apricots) were better before the New Year, though they are still around.
Papayas and mangos are imported from Brazil, I haven't seen as many this season, perhaps there will still be more coming
Melons you can get for a large portion of the year, if you are willing to pay the price.
Avocados -- they have a few different kinds here, the ones we find at home are pretty much done now, you can still buy them but they are very small. There's a larger variety that I think will be coming into the markets soon.
Green Limes, always kind of expensive but you can find them for a good portion of the year
Asparagus (my favourite) is done now, broccoli you can usually find but better in the spring to early summer.
Lettuces: I have no problem getting lovely mixed greens. If you're not finding them at yours, you'll need to go to someone else. My woman even has Kale.
tomatoes: I find vine-ripened Italian tomatoes easily, tomatoes cherry, or hothouse tomatoes with no problems.
At mine I can get fresh rosemary, basil, thyme no problem. Salvia (sage) when in season, Mint is rare to find so if you do, put it in some ice cube trays, fill them up, and freeze for later use.
as we get later into the year there's a huge selection of root vegetables, beets, squashes, fennel, carrots, celery, potatoes, mushrooms, lemons, oranges, apples, pears, cabbages, parsleys, rucula, leeks, parsnips.
Really, it's all there. You just have to look and find a good verduleria. I walk about 20 mins out of the way (past 2 other stands) to get to mine, but I've been going to her for over a year and she's great, gives me freebies etc.
The ones that I miss are the blueberries / raspberries / blackberries, but I buy them frozen and have them on my oatmeal (that I buy at the dietetica) all through the winter.