This post is actually a progression of my forest projects that I started to present last year here: Ficus forest project – progression
As day light already lasts for at last 15-16 hours I considered it’s time to prune my ficus benjamina forests to promote back budding. For this process, I had a proactive approach as from last fall till now I continuously fertilized these trees to increase their strength – and in the same time preparing them for the heavy prune that I will show in this post. Simultaneos, I needed to clean the soil surface because as ficus trees grow, they drop the covers of the new leaves and these rot on the soil surface. In time, it creates an ugly black layer of dead material that, if kept indoors, it will mold, smell ugly and promote fungal issues.
Comparing to the pictures from the post I indicated in the begining you can see that there is quite some growth at this time.
Here is a closeup of the surface soil that is quite ugly and full of dirt and dead material from one season of growth.
Here is the second forest that I created last year. If you concentrate on the soil surface, you can see that here the black material is more aggressive and obvious. This tree as well had a very serious and vigorous growth for one season.
However, both forests are too large already and their branches overlap creating a barrier for the light reaching the lower branches. For this reason, as seen in the pictures, the development of the top of the canopy is more aggressive than of the bottom’s. This must be corrected by pruning now, on one hand, and by future back pruning of the top branches to encourage lower one’s development. Also, the height that the trees reached is over the one that I have envisioned so they will need to be reduced.
Hard pruning combined with partial defoliation was the approach that I did for these trees. For ficus trees, it is important to prune back in this case to 2 or 3 leaves to encourage ramification. A very important issue to consider is that not all the leaves will back bud, there are some that never back bud. A strategy to make sure you cut back to leaves that bud out is to let them start budding. I achieved this by fertilizing them as I already mentioned and letting the branches grow out. On any species of trees, a rule of thumb to promote back bud is to leave it grow long. If you do so, you can see when and where you have to prune, as back to the trunk as possible but always to an already existing bud that will ramify your tree. I cleaned the soil surface back to the clear clay particles that the trees are planted in. Now it remains to continue fertilizing, watering and keeping the trees in sunny condition.
If until now I left the trees to grow wild just to gather strength, from now on I will be more careful about ensuring its growth on the bottom branches and slower growth on the upper ones. This does not mean that I will prune back as soon as new branches appear on the top of the canopy, but I will decrease their growing power by cutting of leaves on these branches. This method ensures the energy distribution of the branches that have more leaves that those with fewer ones.
Hope this helps you and thanks for the visit!