Weed growing guide:
Okay, here’s what I found out after picking and placing weeds for hours....
I believe you can have 120-150 fully grown/large weeds before they stop growing tall. I have 121, at this point the growth seems to slow so i’m not sure if you can get more than that. As far as I know, if you have more than the limit —say you plant over 150 all at the baby stage—none of them will grow.
you can have 150 total weeds before new ones stop spawning according to the ACNH guidebook
If you want your tall weeds in specific places you have to pluck the ones you don’t want because there 1. has to be less than 120 for them to fully grow and 2. the ones that grow each day are random, so one that you don’t like the placement of might grow instead of one you really want to grow.
If you want to do this all in one go, place the weeds where you want them then time travel, picking the newly spawned weeds each day until the weeds that are in the proper place are fully grown. At that point, you should be able to place baby weeds without them growing
once again, as far as I know, more than 120~ will stop new growth. so if you want all baby weeds, just plant a ton at once. And if you want tall weeds you need to control the new weeds until you have 120 tall ones
You could potentially pick every weed and plant exactly 120, watering them until they grow but I haven’t personally tried doing it this way.
Oh also, based on my observations and the ACNH guide book, the bigger weeds are more likely to spawn new weeds nearby. So, if you have a lot of big weeds, those are the areas where new ones are more likely to be each day.
Make sure to check behind cliffs, especially at the very back of your island, you can basically walk along these blind areas mashing B until you character stops picking stuff up. Also check behind buildings and trees by looking up. I’ve found a ton of weeds in these areas that I didn’t notice while quickly sweeping over my island.
