Don't bother with the meter- you're in dirt- drops are FINE FINE FINE.
Spend the $$ on a really good fert. Heck, if you lived closer I'd come over there with some juice and be all, DOO IIIIT ROOKIE!!!! You need fertilizer! Or rather, your PLANTS need fertilizer. You probably need a cup of coffee and some bacon. Is there ANYTHING bacon can't fix?