I decided to get cracking on the rubber trees...
A bit of research led me to believe that the trees we are looking at in the images go by the Latin name
Hevea brasiliensis and are described thus: "Typically 30-40 m tall with a leafy crown. The trunk is cylindrical, unbranched up a long way and then with much-branched leafy canopy, but frequently swollen towards the base. The bark is pale to dark brown with a smooth surface and the inner bark pale brown with abundant white or cream coloured latex."
I started off by making a rough scale drawing based on images I had found on the internet. This was mainly to remind me of the correct proportions and height: 35cms. This is not intended to be true scale height because they would appear to tall (I believe this has much to do with the fact that, close up, we tend to look up at trees, thus for-shortening them in our mind's eye).
The trees were then constructed using the Gordon Gravett method, i.e. start from the top of the tree and work your way down. Although his trees are generally designed in a smaller scale (for model railways) it seems to work just as well in this larger scale. The florist's wire I used, which comes in handy 35 cm lengths, is actually the same brand that he uses! The best guage is the smallest: 30 gauge.
Twisting the wire into shape can be done easily by hand, although pliers help for some of the bigger twists lower down. As you can see, you make a number of separate assemblies which are then combined to make a larger branch or part of the trunk.
In order to make more smaller branches / twigs at the tips I came up with my own trick: looping the single wire around on itself, twisting it back on itself and then snipping the loop to separate it.
Having said all of that, assembling the trees into a realistic and accurate shape was not as easy as I thought. I made quite a mess of the fuse wire used to bind the clumps of wires in place, which is why I resorted to using masking tape to cover up some of the roughest areas.
Here are the trees temporarily installed...
I then coated the trees with PVA glue. Here, however, I made a schoolboy error. For some inexplicable reason I decided to hang them upside down whilst waiting for them to dry. I guess I was thinking that the glue would run towards the tips of the branches and help to create a graceful point. It didn't and instead formed some ugly lumps. However, I am confident that this will all be hidden when it comes time to add the foliage.
The next stage is messy - and fun. Basically you make a mixture of PVA and plaster powder (I used a ceiling product called Artex recommended by Gordon) and add some colour (I used acrylic brown paint) and then 'paint' it onto the trees. After a few coats were applied and left to dry, I sanded them down to try and make them as round and smooth as possible.
Initially I started making the fallen tree (which should be behind, not in front of, the Ha-Go, unlike my earlier shots) using the same method, but I felt that it just didn't look right. So in the end that tree ended up joining the others at the back of the diorama and I constructed another using real dried heather branches, a wooden dowel and some masking tape. It has yet to be covered with the PVA / ARtex mix, however.
So finally here some shots of the diorama with all the trees assembled, but yet to be painted. I have some foliage on its way. The road, buy the way, has only been started by gluing a thin cork mat into place.