I've grown Honeylocust from seeds too. I never experienced any unusual watering with them, unlike Baldcypress, I think unless Baldcypress seedlings are watered often, they will likely succumb to lack of water. If it were me, I'd transplant them into the ground as soon as possible if you have a spot picked out. I think the chance of their survival would be better in the ground where they could experience more natural conditions. They always grew fast for me, it seemed like I was re-potting them into a bigger pot all the time, because they would soon out-grow pots! I always thot (Gleditsia triacanthos var. 'inermis') Thornless honeylocust seedlings were neat because they didn't seem to be developing thorns (even after a few years), on any of mine anyway. And I even thought the thorned straight species was neat, (hey nobody would climb the tree!) I think the thorns are ornamental anyway. Here is a photo of a Thornless Honeylocust seedling that I started in a soda cup a few years ago. -

you have to get rid of the big tree ... and then go retentive on snipping and dripping roundup on every single one.. until you kill the root from which they spring to life ... i agree you might want to increase the mowing ... to keep knocking back leaf formation ... or you will never kill the things ... ken

Far as I know Honey Locust is pretty tolerant of different moisture conditions. I do not notice it next to the big rivers here as much as the cottonwoods and sycamores but have read it is short term flood tolerant. Is the city expanding their Right Of Way? Or perhaps worried about damage to the root zone from digging or compaction? Sucks to be fighting city hall. Good luck.

no specifics on this cultivar that I could locate species height 60-80 feet variable spread shorter range in drier climates such as mine and yours um casts light shade that does not inhibit growth of vegetation and grass under it i have no idea about your rainfall, climate and soil. This tree may or may not be a good choice for you. Some information snippets I could find.. "Âthis [millwood] tree tends towards a biennial bearing of light/heavy cropsÂ." "Âproduces leaves late in spring, has sparse, open canopies, and release[s] leaves early in fall Â. they allow penetration of sufficient light to support forage growthÂ." " [young] Palatable trees (e.g., honey locust) require greater protection, especially from animals that browse (e.g., goats and deer)Â." Flower does not smell, either. Link below might be helpful Here is a link that might be useful: http://www.plantmanagementnetwork.org/pub/fg/review/2004/silvo/