Ive had success with Canna Vega A&B. Not sure on availability, check the canna website. Its in liquid form so very easy to apply. Just follow the directions. mine started to flower then i started using Vega. They quickly doubled in size and flower volume. now in week 4 of flowering and alternating between vega and thrive flower & fruit. every 3-4 days as they are in small pots. Ill throw up some pics soon.