I have a large number of AV's. Many of them have spectacular blooms, but only for a relatively small time. I alternate dyna-gro (7-9-5) and optimara (14-12-14) and use 1/4 tsp/gal for watering each time. Although the AV's are very nice, they seem to go through the bloom cycle fairly quickly. I am wondering if a violet is blooming nicely would feeding it with plain water prolong the bloom? Or should I put plain water into the cycle and alternate with 1/3 dyna-grow, 1/3 optimara, and water. Would appreciate any suggestions.