When you say "other forms of vegetation," what are you seeing. Fertilizing a pond with certain aquatic plants already growing can be a big mistake. They will soak up the fertilizer and explode all over your lake, which will remain clear and facilitate weed expansion. Algae is often present in many lakes I fertilize at the beginning of spring. It is a judgment call as to how much and what kind it is before deciding whether to fertilize or kill the algae first. It is normal for the algae growth to spurt initially and then recede and give way to a bloom. This is not always the case, especially if a lot is already growing or a low dose of fertilizer is applied on the first go around. Mistakes on a lake that size can get expensive in a hurry. It may be more economical to get a pro like Bob on-site to analyze your vegetation issue and show you the way in the early going of the management.

-HH