I have decided to plant some trees in the ground over the next few years to aid their development. Here is the start of the project captured on video.
What to do on a wintry day with the wind howling outside, rain bucketing down and more to come judging by the Ruahine Ranges covered in dark, ominous looking clouds? One idea is to cuddle up and get a good book out, another to get a hearty soup on the go, but the one that I gravitated towards, was to work on a nursery stock, small Chamaecyparis obtusa standing on my Bonsai bench. It has been there for more than a year now, just waiting for a day like today.
The Chamaecyparis, also known as the Hinoki False Cypress, is native to Japan. It is a very slow growing tree and the nursery label on this little one states that it will grow to 60 cm high by 50 cm wide in 10 years. It has whorled branches of lovely dark green foliage and an upright habit with character and charm. Obviously not for long.
Before I start, here is some more information on the Hinoki Cypress. The foliage consists of evergreen, fine scale-like leaves, dark and shiny green above (adaxial) with glaucous margins between scales which form a distinct “x” shaped pattern beneath (abaxial). This species is monocious with small male reddish brown cones and slightly larger female flowers which are round and yellow-green in color. It bears fruit in late summer, but these are quite small. The bark is gray and scaly with long furrows of reddish brown inner bark which peels in long, narrow strips.
With this wind howling outside, I am going to let it influence my thinking and create a windswept (Fukinagashi) style shohin. I am sure that other styles will come to mind as I progress with this little tree.
Ask a room full of Bonsai artists about soil and you will probably get different perspectives from each and every one of them. Soil for Bonsai cultivation is widely discussed and opinions are easy to find. From those who can afford to import Akadama and other Japanese sourced mediums through to Cat litter soils and organic mixes, all serve a purpose. In the end it is probably better to talk about the “Growing Medium” rather than soil as some Bonsai trees grow in mixes that can hardly be classified as Soil when one goes with the “normal” definition of what soil is. Here in New Zealand we just refer to it as “dirt”, but that is probably not good English for what we use to grow our Bonsai in. One thing that is not very well considered when it comes to soil and soil types, is the pH of the soil for Bonsai.
Ph is a measure of the acidity and alkalinity of the soil and is expressed on a scale that goes from 0 to 14. ) is very acidic, 7 is neutral and 14 is very alkaline. Soil pH is largely determined by the type of rock or parent material that the soil originates from. Limestone for instance will produce soil that is more alkaline. Soils with a higher content of decomposing organic material normally lies on the acidic side.
The pH of the soil is important as it affects the control of the solubility of different minerals. Different minerals are available to plant roots at different pH levels. What is available and can dissolve at a low pH, will not be available at a high pH as the solubility of the mineral is effected. Soil pH also has an effect on soil structure and the activity of soil organisms.
Some plants do not have a big issue with pH levels, but others are very specific. In the Bonsai world, Azaleas and Camellias could be a good example. These plants prefer a slightly acidic soil. Fruit trees also produce more fruit in slightly acidic soil. This is not a major consideration for Bonsai artists as Fruiting Bonsai are not necessarily grown for its fruit. As a whole, pH is something to be kept in mind for Bonsai artists, especially for those pH specific trees, but our larger concern should be for the drainage capacity of the soil. Here-in lies another challenge. Due to the free-draining characteristics of most Bonsai soils, it is very easy for minerals to dissolve in the water and be washed out of the soil. It is therefore important to fertilize the trees and to ensure that a good mineral supply is available.
What do you water your trees with? Water you say. Yes, but not all water is created equally. Your water supply could contain different types of chemicals that can in turn be deposited in your Bonsai soil and over time, alter the pH of the soil. Areas where the air is highly polluted can acidify the rain water and this in turn can change the chemical composition of your soil. So, what to do?
Common sense and logic, although sometimes scarce, should prevail. Water your plants with what you have available. If it is rain water from an unpolluted source, you are winning Lotto. If it is town sourced, it could contain all sorts of things like fluoride. The main thing is to be aware of your water source and to act accordingly. Also know that regular watering will wash nutrients out, therefore fertilize and use mineral supplements. If you are worried or just inquisitive about the soil pH, get a digital tester or a testing kit and determine the pH. If there is a problem, it can be rectified by either a preventative strategy (like only use unpolluted rain water or do not use organic material in your growing medium) or use supplements that will get your soil to the ideal pH for the specific tree. My experience is that to not let pH become something that makes you lie awake at night, but to use the opportunity to get to know more about your tree, find out about its specific pH preferences and then adjust by either supplying minerals or changing your growing medium when needed.
Images are open source and the last one is from http://www.exoplexity.org.
I currently have a few trees that do not look very refined. As a matter of fact, they look like shrubs and in some cases like Bonsai trees with one or two branches that were missed at the previous pruning. This is all done deliberately for very specific reasons. The sacrifice branch is a necessity in Bonsai growing.
Why do we need to do this? The main reason is to enhance growth in a specific area. The theory is that the branch that is allowed to just grow and increase in length will have more sap flowing through it, therefore more nutrients and in turn you get a much faster growth rate compared to regularly pruned branches. One specific case would be to thicken the main trunk. This could be either during the early years after a seed has germinated or a cutting has struck. The more side branches you have that can grow, the thicker the trunk will become. The leader is of importance here. Let this grow until you get to the desired thickness and then cut.
Another reason is to improve taper. If a branch or two are left on the trunk to grow out, the area below the branches will thicken more than the area above it. This leads to a thicker bottom half if the branches were left halfway up the trunk, compared to the top half of the tree.
Another reason for letting a sacrifice branch grow is to get a side branch to thicken in proportion to other branches. An example of this could be that a branch is needed lower down on a trunk and the branches above are all thicker than the lower one. The lower one is then left to grow until the desired thickness is attained and then it is cut back.
There are a few things to keep in mind when sacrifice branches are used. The first one is to remember that the sacrifice branch will create more shade than other branches and this could impact negatively on the growth patterns underneath this branch. A second point to remember is that sacrifice branches that are cut back, can leave quite large scars that will have to heal over time. For trunk thickening it could be best to use a branch at the back or in a place where the design of the tree will hide the scar. A third point to mention is that side branches will start to grow upwards. This growth needs to be controlled if the branch is suppose to be horizontal or even growing slightly downwards.
In the examples below, sacrifice branches were mainly used to thicken side branches to either fill a gap, create a new branch or to correct parallel branches.
Top left: There are two vertical branches parallel to each other growing from the main trunk as well as two bar-branches at the bottom.
Right: the one parallel vertical branch was removed and a new branch allowed to grow out at an angle, removing the parallel effect.
Bottom left: The sacrifice branch and the vertical branch in close up to compare the thickness. This is one season’s growth for this maple.
In an earlier post (https://wordpress.com/post/bonsaiplace.net/515), I have written about the germination of Pine seedlings. These seeds (planted on 26 January 2016) germinated very fast and are now large enough to change into cuttings. The reason why I do this is that it gets rid of the tap root early on and forces the seedling to grow new roots and the hope is that the new roots will develop radially for a really great nebari. That is theory.
I started off by making sure that I have all the tools needed to start the process. This included containers with seedling mix, a surgical blade, hormone rooting liquid as well as my trusty Rhizotonic.
The first step is to wet the seedling mix in the container with the Rhizotonic solution. Rhizotonic is a dynamic, organic root stimulator and stress reliever (wonder whether it works for humans?). I use it for everything that is re-potted, yamadori that are planted and especially for plants where a lot of roots have to be cut.
The next step is to very gently remove the seedlings from the original container. This phase needs to be accurate and quick as the seedlings cannot dry out during this time. The seedlings are placed on a cutting board and the tap roots are removed by cutting through the seedling where the stem and taproot meets. It is important that a very sharp blade is used as the stem cannot be bruised or crushed at this stage.
The seedlings are then handled by the leaves to further prevent bruising to the stem and it is placed in the rooting hormone. From here the seedlings are quickly planted in the seed raising soil. The seedlings are now watered in with the Rhizotonic solution and placed in a shady, but warm location. From here the seedlings will be sprayed with the Rhizotonic solution twice a day and if necessary even three times a day. Now the wait begins. The date today is 20 March 2016.
Wikipedia defines Tanuki Bonsai as a technique where a living tree is joined to an
interesting piece of deadwood to create a composite in the
driftwood style. It goes further to state that the deadwood usually has the form of a weathered tree trunk. The tree is attached to the deadwood by making use of screws, clamps or wire. Over time, the tree will grow into the channels created and in so doing will disguise the fact that it is a separate entity.
In Japanese folklore, Tanuki, the Japanese raccoon-dog. are shape-changing tricksters. It is also known as Phoenix-grafts in the West. Personally, I think it is a good artistic technique to either enhance a piece of deadwood or a tree. There is no difference in attaching a tree to a rock compared to attaching a tree to a piece of deadwood. I had to try my hand at this. My experience is written up below.
I first had to find the right tree. I decided on a young Juniper with a lot of flexibility. The next project was to find a suitable, characterful piece of deadwood. I managed to get a piece on the beach. A note of warning is needed here. If driftwood from a beach is used, it is important to get rid of all salt on and in the wood. I submersed the wood for three weeks in fresh water and regularly changed the water as well as used a high pressure stream of water and scrubbing on it. It was then left in the sun for another week. The third component was a pot selected from my pot collection.
The first job on the pot was to get enough tie wires in place as the deadwood and tree must be secured very firmly. It is wise to get a hardener on the deadwood. I treated it with lime sulphur as the bottom part will be in the wet soil. I have read that the end could also be placed on a solid object like a tile to minimise the part in contact with the soil. My first challenge was to drill extra holes in the pot. For the first time in my life, I had a pot which is so hard, that the drill bit did not even make an indentation on the pot. The tie wires therefore had to be attached through the drainage holes.
The next phase was to ensure a flat structure at the bottom of the deadwood to make it stand more solidly in the pot. This was done by simply determining the angle, marking the wood and using a handsaw to make the cut. Next I had to drill holes into the deadwood for the tie wires. Advice found was to use a router to create channels in the deadwood. This was not necessary on this piece as it had natural channels that could be used for the tree to be placed in snugly.
The tree was now prepared by preparing the roots and cleaning up the trunk. It was put in place starting at the bottom and fixing it to the deadwood with non-reacting (copper) thin screws. I pre-drilled the tiny holes as the tree is very thin in places and did not want it to split. Branches which came in the way of this process were removed. I decided to leave the growth at the top as is as I did not want to stunt the growth too much at this stage. The whole idea is that the trunk fattens up to secure itself into the channels and adhere to the deadwood. Branches were wired and now the maintenance work of feeding and watering begins. No pruning will take place until the two entities become one (hopefully).
Cheating or a legitimate technique? You decide! I found a reference on bonsainut.com that mentioned that Masahiko Kimura designed Tanuki and it also mentioned that John Naka once threw one out of a display and told the owner to go and get a real Bonsai. I will update this post as the Tanuki showed here progresses.
During a conversation with Noel Plowman at the National Bonsai Convention and Show in New Zealand towards the end of 2015, Noel made the statement that it is hard to get good Pine genetic material in New Zealand. Most of the seedlings propagated for the forestry industry is genetically engineered to grow straight trunks with no bark. Both of these factors are not really what Bonsai growers want. We then talked about the thousands of very old Pine trees all over New Zealand, mostly growing on farmland. The photo below shows such a scene, complete with good old New Zealand dairy cows.
This made me look at these trees in a different light and it did not take me long to go and scavenge on a farm (with the farmers permission) to find these original genetic material in seeds for propagation purposes. This I did knowing full well that I am germinating these seeds for the next generation and not myself. The main idea was to collect the cones from trees that show thick bark.
Cones collected, the next job was to get the seeds out of the cones. This basically ended up being a good solid shake of the cone and the seeds fell out. Quite a few seeds were harvested from each cone. The wings were removed from the seeds.
The next step was to find the viable seed. This is done by placing the seeds in a container with water. The seeds that sink are more viable and the ones that float, are discarded.
I left the seeds overnight and planted the viable seeds the following day. The seeds do have a pointy end and the seed is planted with this pointy end facing downwards. Now the long wait begins as it is known that these seeds can take a long time to germinate and that they do so in a haphazard way. I will update this post as the process unfolds.
The waiting is over. This was quick. Only three weeks from planting to germination.