90 days, OP. 6" sweet. Stores 1 mo.
We do these every year - so delicious in salsa and used fresh while they last. They don't keep well at all.
2022: The starts were quite a bit smaller than the reds again. Cold May, not a lot of growth, but they look healthy enough. None of the onions did well this year. Very small. Might skip onions next year.
2021: They didn't get weeded and we only got a few small onions this year. So sad.
2019: All the onion starts were smaller this year, but they are doing well. Update - the gophers are eating all the dang onions!