Posted: 18/06/2013 at 07:26
Chris, the secondary stem - or "leader" - has a growing tip at the top. You'll see new growth appearing, including wee flowers, as it continues to develop.
Leaf branches, which grow laterally, don't have growing tips. They just grow laterally and stop. "Suckers", which you can nip out, grow from the intersection of a leader and a leaf branch. "Suckers", if left to grow, usually have a growing tip and will develop into another leader.
Leave the leaf branches attached because the plant needs the foliage for photosynthesis in order to grow.
As the plant develops, though, you can take off the lowest branches to leave a gap of about a foot between the lowest foliage and the soil. This helps against fungal spores splashing from the soil up onto the plant during watering.