Hi Mike, hope you don't mind if I make a suggestion that will save you some time and money over the summer. So far, you've done everything right, in amending the soil so well, etc. What I'd suggest now is to switch to a pelleted, slow-release fertilizer to replace your Miracle-Gro regimen. Here are the reasons:
MG is a soluble fertilizer, readily available to new plants getting established so it's good for what you've done so far. But since it is so soluble, if you fertilize on your regular 2 week ? interval, and it pours with rain the next day, all your nutrients are flushed down through that porous soil, away from your plants. Now they have to wait another 2 weeks for you to fertilize again. Going into June, we can expect regular downpours. (let's hope!) The other down side of using a soluble fertilizer is that it ends up washing out in the storm water into the rivers, lakes and eventually out to the Gulf.
What I use year-round for the whole garden is a pelleted, timed release general fertilizer, some thing like Osmocote, Nutricote or Dynomite. Anything that says on the label "lasts 3 (or 4, or 6) months". I get the one that claims the longest release time, since here it has to last from June through September. In our hot, humid climate, the pellets do release a bit faster than the labels claim.
Don't know about Pinellas, but down here in Sarasota County, we have a fertilizer ordinance that forbids us from fertilizing our gardens with anything containing a nitrogen component (the first of the 3 numbers on the label's fert. analysis) between June 1st and Sept. 30th. It is to prevent excess fertilizer runoff into the waterways during the rainy season. So here we are at the end of May and everyone is fertilizing their plants with slow-release to last through the summer.
It's a more responsible way to go, not to mention it will be cheaper and less work for you in the long run. Btw, it's also good to keep amending the soil with maybe a truckload of compost every spring. Our county landfill makes great compost and it's available free for the taking (but you have to go get it and load it yourself). The organic material breaks down and disappears over time. All that good cellulose fiber acts like a sponge to hold the moisture and nutrients around the plant's roots so there's nothing better than compost as an amendment.
