I just purchased six stems of alternanthera reineckiI minI . Before I planted them they were really tall. So I cut the stems in half and planted. It's been about a week and the plants are growing roots not only from under the soil but from the top part of the plant down to the soil. Do I need to cut and propagate again because there's still about 4 to 6 inches long .some of them .or will they just continue to do this until they get good root system. I have a 29 gallon with highlight Fluval stratum substrate and I dose fertilizers once or twice a week. Can anyone help anyone know what's going on? Thanks and be safe!