How do I progress after I've fully upgraded the garden? The wiki says I can buy tools and seeds in the Park but the city is under lockdown.
buy tools and seeds in the Park but the city is under lockdown.
In that case you can’t, not until next version.
Game warns to not start last event for Lin until all other activities are completed. The Lin event causes the lockdown.
You could go to a save before that last Lin event starts, then you can go to garden supply seller.