This is the start of my second year growing phalaenopsis, and my first time trying to induce them to spike, rather than buying them in bloom. I have them in semi-hydro, and on seedling heat mats. I grow them under lights, one 5k and one 3k, and didn't take them outside in the summer.

My question is, do I need to change anything to induce spiking? Will the heat mats prevent the phals from feeling cool enough for blooming, or will the general room temperature (am in NJ) be enough? Should I alter the length of time the grow lights are on per day, to mimic the sun? Should I add ice cubes, or turn off the heat mats for a few weeks?

Sorry to bombard with questions, but there are a lot of variables and I don't want to miss out on flowers this winter! Thanks for the help.