Old leaves naturally die back, but the plants should be showing new growth at the same time. When the leaves fall off, are they shriveling up or do they look more like they’re melting/rotting? Dry, shriveled leaves can indicate too little water; rotting leaves, too much.
Were they left outside on a cold night (less than 50F)? Depending on how cold it got, this could have affected them.
Giving them more light might do the trick as well.
Old leaves naturally die back, but the plants should be showing new growth at the same time. When the leaves fall off, are they shriveling up or do they look more like they’re melting/rotting? Dry, shriveled leaves can indicate too little water; rotting leaves, too much.
Were they left outside on a cold night (less than 50F)? Depending on how cold it got, this could have affected them.
Giving them more light might do the trick as well.