You can expect new growth, more or less every two months. There is a foliage growth period, followed by a root growth period, than the cycle starts over again. - Millet

Thank you both for the help. Does the 2 month period only apply to seedlings?

No, it applies to all citrus trees. However, during the winter months, you must keep the light and heat up to summer standards to keep the new flushes coming, or the tree will stop the cycle until the following spring. - Millet