There are few 90 day varieties. I think Georgia jet is one. I had it and another 99 day 7 or 8 years ago. Now I mostly just grow some beurgaurd and some purple sweet potato I got from ebay that supposed to be some Japanese variety. I like it. It's not very sweet taste more like a regular potato. I don't cure to sweeten them up either. I don't like sweet sweet potatoes.
Best part about sweet potatoes though is you can just toss them in a box in the garage and they last for years. I start my slips with my 2 year old left overs. I could probably just pull the tubers out of my slip tup and use them again next year if I wanted, but I usually cut them up in a compost pile.
View attachment 8785087