After first trim. Both have grown strongly this Spring and some extension shoots and larger leaves have already required removal. Both have been in a greenhouse up until now but will shortly be placed out on the benches. I find keeping them under glass until the leaves are fully hardened is a safer bet. Over the last few years I have experimented a little with defoliation, partial defoliation and just extension pruning to see how Tridents react. This is part of bonsai, constantly looking to see how trees respond at different times of the year to different techniques, feeding regimes and weather. No two years are the same and it can be hard to reach any concrete conclusions. But if this was easy, we’d all be doing it