Wondering if an adventurous add on developer might consider taking on this addon idea.
It will track what main and alts have planted in the farm.
It will include a list of crops that you want to grow.
Includes Quest from Farmer Yoon and Jugu's crop suggestions (maybe)
How it would work:
You need 50 carrots and motes. On your main, you plant 5 carrots and the rest motes. You then go to your alt, see that you want to plant. It will remind you which seeds to buy. Once planted you go to the next alt, and it reminds you what seeds are left to plant.