so I've narrowed down different yaoi manga that will kinda fit your description lol. and even if they did not fit, I'm just gonna wait for someone to find it coz I'm also curious
https://www.mangago.zone/read-manga/worlds_end_no_niwa/
https://www.mangago.zone/read-manga/kuyuru/
https://www.mangago.zone/read-manga/renai_rubi_no_tadashii_furikata/
https://www.mangago.zone/read-manga/yasashii_koi_ga_sodatsu_made/
thank you so much for these, I'll read them. they aren't what I am looking for tho. However you definitely helped me find it lol. I searched through the plants/bonsai/garden tags from these and found it.
https://www.mangago.zone/read-manga/kare_otoko_ni_izumi_o/
and realized my memory is very shitty ╮(￣▽￣)╭ seme was the one who talked with plants. uke had black hair lmao
np I'll read that too^^
So... i remember this black and white manga. i warn you, it has been a long time since i've read it, so i can't be generous with details.
The uke had this long-ish light hair and could talk with plants in his apartment. idk why. Seme had short hair and was in coveralls a lot due to his job (i think he did maintenance at uke's workplace idk... it rings a bell)
and that's it. good luck hunting this lol. you'll get my neverending gratitude for a reward