Replanting

Should I be replanting my plants from seedling trays to 9" pots or should I be re planting them 2 or 3 times as they get bigger?
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I feel its best to transplant about 3 times. IME, the the roots end up using a majority of the final pot doing this. I plant seedlings in something like your size, then transplant them into 1-2 gallon pots for a month of veg, and then into 3 1/2 to 4 gallon for flower.
Can you see roots crowding up in the bottom of your pot?

my plants are only 6 to 8 in tall at max

They should be good for a min in that size pot.

knightkon said:

my plants are only 6 to 8 in tall at max

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My question was about roots in the bottom of your pot. That is a decent indicator of need for transplant.