I would do exactly this 
It is also a good idea to inspect the underside of your plants leaves every once and awhile as they are growing. If you see any other than beautiful green or anything use your microscope or jewelers loop.
This may be a great time to be thinking about Integrated Pest Management (IPM) going forward. Especially considering that you will be growing outdoors. There are all kinds of IPM that you can use. I just grabbed this one from a quick search.