by: Norberto Betita
I have long since liked to plant more bonsai on rocks
experimenting on how a few small roots could eventually grow into a fantastic display
of complex aerial roots and bind the rock. Most of my rock dweller specimens
are of the Ficus variety and a few Schefflera.
These plants are the only varieties that could really bound the rocks
upon which they are planted even to the end of covering the whole rock with
enlarged and growing number of aerial roots.
One of the fastest binders I have observed is the Ficus virens var. Sublanceolata. Except for a few specimens which are grown from seeds, these trees were raised from out of small cuttings originally planted in deeper pots until they grow two or three longer and larger roots, The growing specimens were then replanted over dead coral rocks with their roots reaching the soil. The roots are bound into the rock for it to hold on. As they start to take the nutrients, more aerial roots grow and are guided towards the soil. As these aerial roots reached the soil they grow and again produce other roots until they are multiplied more and more eventually binding the rock tightly that you can pull the plant without dropping the rock.
One of the fastest binders I have observed is the Ficus virens var. Sublanceolata. Except for a few specimens which are grown from seeds, these trees were raised from out of small cuttings originally planted in deeper pots until they grow two or three longer and larger roots, The growing specimens were then replanted over dead coral rocks with their roots reaching the soil. The roots are bound into the rock for it to hold on. As they start to take the nutrients, more aerial roots grow and are guided towards the soil. As these aerial roots reached the soil they grow and again produce other roots until they are multiplied more and more eventually binding the rock tightly that you can pull the plant without dropping the rock.
Ficus Rubiginosa (Rusty Fig) is also one variety that
produces multiple roots and very resilient. It can produce more branches even
when planted over a rock and provided with very limited soil only. It easily produces
more fruits even with very limited nutrients. Its leaves are shiny and grow
faster. When pruned it easily produces new shoots. Small birds usually enjoyed
feeding from these trees because of its abundant fruits. Seeds from the wastes
of birds are carried by ants into the crevices of concrete blocks and new trees
grow as epiphytes growing on decorative rocks on walls. These new trees in crevices are good specimens
for another root over rock style because they produce longer roots while growing
in crevices dependent on air and minimal water.
Like the Ficus Rubiginosa, the Ficus Microcarpa (Ficus
Crassifolia or Wax Ficus) is also a rock binder and dweller, and good fruit
producer. It produces fruits the whole year round.It can survive over a rock
with very limited soil. Its leaves are round and shiny and thick. It is a dwarf
variety with short and smaller branches especially when grown in a shallow pot.
I had not seen this variety growing into a large tree in our place even if
planted on natural ground. It can easily be reproduced from a cutting
especially when it is cut together with an aerial root and planted with it.
The aerial roots of a Ficus Retusa (Banyan Fig or Taiwan
Ficus) variety usually grow from the top down. When properly guided and
regularly checked, they bind the trunk and into the rock where the trunk is
planted until it reached the soil. As more aerial roots are produced the whole
trunk is covered and even the rock becomes almost invisible that the large
multiplied roots forms like a large trunk.
Hawaiian Umbrella Bonsai Tree (Arboricola Schefflera)---Exposed Roots Style |
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