Blogger for Hydroponics Gardening Site

I'm looking for someone with an interest in hydroponic gardening who would like to blog for us. Initially, I would like posts of 300-500 words (3 per week) and would like to continue this on an ongoing basis if we work well together. Posts should be accurate (well researched), grammatically correct and engaging with great headlines. The ideal blogger will have a conversational style that will appeal to those who may not know a lot about this topic as well as provide useful information for the more advanced hydroponics gardener. We would like this to evolve into a community that is a trusted resource for information on hydroponics and sustainable gardening. Please quote per month (3 posts per week for 4 weeks) We are looking for someone who understands specifics of blog writing and has written blogs before.