I was pleasantly surprised walking into a large department discount store and finding insecticidal soap sitting at the end of an aisle in the garden center.  Insecticidal soap is a fantastic organic, non-toxic pest control product, and I couldn’t have found it at a better time since white flies just took up residence in my greenhouse.

The discovery that weeds like it outside the south wall of the greenhouse.  So, today I took a spray bottle of vinegar to them and had at it!  They are small enough that it should only take the one application to get rid of them.  All I had was household vinegar which is diluted, but have been told that you can get horticultural grade vinegar which is full strength, but haven't gotten my hands on it yet.  Hot sunny days seem to work best.

Plants are delicate when they are very young.  The first general rule of (green) thumb is to handle the seedling by one of the leaves and not the stem.  The plant can recover from a damaged leaf more easily then a damaged stem.