Geraniums have been popular garden perennials for a long time, and have lots of devotees. Consequently, there are lots of good sources of information on the internet. A good start is provided by the Open Directory Project's geranium category. For a primer on erodiums, this page from the UK gives a good overview.
Stimulus control is the phenomenon of a stimulus increasing the probability of a behavior (operant response) because of a history of that behavior being differentially reinforced in the presence of the stimulus.
(1.6.2) Process Definition. Integrated Change Control is the process for [...] reviewing all change requestes, approving changes, and controlling changes to the deliverables and organizational assets (comp. PMBOK3, p. 79) Part of the Monitoring and Controlling Process Group.