Not sure if you're still confused about grafting but carl's sims 4 guide (you can google it) has info about everything the game has to offer. You can get dragonfruit relatively early now by grafting snapdragons onto strawberries. You only need level 5 gardening skill now (was previously level 7.) The most efficient way to earn fast simoleons with gardening is to graft your high quality plants onto tomatoes or strawberries with base game or fireleaf if you have Outdoor Retreat as the growth time is only 24 hours for the former and 18 hours for the latter. 10 plants of strawberries and dragonfruit can net you from $1000-$10000 a day depending on the quality. U.F.O fruit can be grafted onto another plant as well and any quality plant that you graft onto another plant will copy it's quality (a normal lemon grafted onto a pristine tomato will increase the lemons quality to pristine as well.) Another good combo is to graft dragonfruit onto snapdragons so you're getting roughly 2-4 dragonfruit and cowplant berries every 24-30 hours. Cowplant berries sell for a lot, especially if you have the patience to plant a bunch and sell them when they grow.
