Bonsai for Beginners – Part 3 – Basics of Tree Physiology

Previous part.

Of those many books that I have read about the art of growing bonsai trees, only one goes sufficiently in-depth about this issue. Unfortunately, that one book is probably only available in Czech. I will not go too much into depth here, just the basics for your own research should you wish it.

The distinction between a tree and a bush/shrub is not clear-cut, but there are properties that some plants have that make them definitively shrubs – like roses – or definitively trees – like spruces. A rose, no matter how big and old will be unruly and bushy. Spruce, no matter how small, will be a tree, with a definitive main stem.

The most important factor in this is the absence or presence (and strength) of so-called apical dominance. In plants with strong apical dominance, the main stem produces hormones that regulate and/or inhibit the growth of secondary branches. That is the reason why spruces almost invariably have one upright stem with comparatively thin branches – they have very strong apical dominance like most conifers do. Roses, on the other hand, do not have apical dominance worth speaking of. They continuously sprout new twigs from the base of the stem near the roots. Common hazel is somewhere in between – at the start it has strong apical dominance, but the bigger the main stem gets the smaller inhibiting influence it has, it slows its growth and inevitably suckers start to sprout from the base even when the main stem is perfectly healthy and strong.

Apical dominance applies to roots too. Some plants tend to grow long, thing, non-branching roots, some have bushy ones.

It also changes during each season – in many plants with leaves the hormones are produced by the leaves, thus the more leaves there are on the branch/stem, the more it inhibits those below it. That can be used to your advantage for certain species – more on that when talking about them.

For a beginner, plants with strong apical dominance should be avoided, especially fast-growing ones. Many such plants when cut do not branch out but simply the bud nearest to the cut continues as the main stem. Some might even die. Best are plants with some apical dominance, but not a very strong one. But also not so weak as to tend to sprout suckers each season.

That, unfortunately, means that for a beginner or a small-scale grower, the most iconic of all bonsai trees – pines – are not suitable, as well as most of the coniferous trees overall. They are the most difficult to manage and to form, and some of them are downright snowflakes. Best suited are leafy plants, with moderate growth rate.

I will go into more detail when talking about specific species in due course.

Speedwell, Veronica

Our weekly flowers from Nightjar are here, and they look frosted with fairy dust.

Veronica persica or winter speedwell. These tiny blue flowers measure about one centimeter and are very common here in winter, especially in cultivated fields. They are so small to the naked eye that I never noticed how beautiful and shiny they are before seeing their photos on the computer.

Veronica, ©Nightjar, all rights reserved

A Knife for my Brother

I did not manage to finish a knife for my brother’s 50 birthday last year, for I nearly hacked off my finger with a hatchet. So I am rectifying the issue this year.

This is the blade that was hardened when I was working on the rondel dagger. It is not a perfect blade, aesthetic-vise. I messed up the polish a few times and I had to eventually stop trying to correct it otherwise the knife would turn into a small razor. It is a good universal kitchen knife, very good cutter, I am just not happy with the surface finish. But it is either this or nothing and this year I want to give my brother a knife I know he wants. He is going to appreciate it even with the flaws.

© Charly, all rights reserved. Click for full size.

I tried to make up for the flaws with the handle, so I have used a piece of partially rotten lilac branch that I have harvested last fall. It is just stunningly beautiful wood and this is probably the prettiest knife handle I have made so far. The wood is rock-hard with tiny pores (lilac is one of those woods that can take 1000 grit polish without dirtying) and would probably hold up well even without the boat lacquer coating. But it was partially rotten, so the outlying regions were not only discolored, but also softer, so I soaked it in boat lacquer to stabilize it. With the coating, it should be near indestructible.

The lilac-colored heartwood will probably age into dark brown over the years, but it might take a really long time since the branch was already several years dead when I cut it off.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

Tree Tuesday

Today’s tree story is about another victim of the cult of Greed. Developers, building artificial islands for luxury resorts, are buying mature coconut trees from farmers, but their removal and relocation has many people worried.

Kaashidhoo is one of the largest of the 1,192 islands that make up the Maldives archipelago, but unlike many other islands, it does not teem with sunbathing Europeans. Its broad dirt roads are often deserted, flanked by pink Maldivian roses, mango-orange impatiens, and papaya and banana plants. The main occupation of the islanders is cultivating coconut and other tropical produce that can be sold in Malé, the Maldivian capital.
But lately, the local economy has been thrown out of balance. Crater-like holes have begun to appear across the island, some filled with dry leaves and others left as barren pits. These bald patches are the places where mature coconut trees used to stand tall. In the last year, Kaashidhoo farmers have sold hundreds of trees to new luxury resorts on nearby artificial islands.

While some locals are grateful for the newfound income—$20 to $100 for each tree—others worry that beach erosion has intensified since the trees started getting uprooted. They see this as a fragile ecosystem threatened by the proliferation of luxury resorts. “It’s a huge issue,” says Ibrahim Naeem, Director General of the Maldives Environmental Protection Agency. “Importing coconut palm trees is prohibited in the Maldives, so they have to rely on residential islands.”

As time has gone on, environmental changes have set in.

Yet as the year went by, and more coconut trees disappeared, Jameel says that many locals grew concerned. Coral islands like Kaashidhoo are highly dynamic, constantly adjusting and dancing to the idiosyncrasies of wind, tides, and relentless waves. “Everyone has observed far more erosion around the beaches. That’s what we end up talking about most of the time,” Jameel says. In response, she joined a non-governmental organization called Young Leaders, to spread awareness about environmental issues on the island.

Also, once these areas are developed, locals are encouraged to stay away, and many of the benefits that they were promised from development have never materialized. Environmental groups are now co-ordinating campaigns to strengthen and enforce the laws, and they’re using the #mvtreegrab. I usually forget to Twitter, but today I will, and I’ll add that hashtag. There are plenty of pretty pictures with the story, so go have a look… if you can stomach another bad news story.

story via: Atlas Obscura