Finally got back to the layout - but really to the Burr Oak. I stripped the tree down to bare wire branches and started re-attaching the limbs. I did not have any black shrink tubing so decided to try hot melting the limbs. Worked OK, but is messy. Next time I'll use the black shrink tubing to hold the limb in place and then cover with a mix of white glue and coffee grounds (or latex plus coffee) to set them in place. In places where I had extra wire I twisted it around the stem to hold better. I also took the longer stems and added branches (leaf clusters) to get the 3 dimension look. The heads themselves are rather flat disks.
NOTE: I am going to try to use the following consistently to describe the build:
- Wire arbor and wire branches to describe the bulk of the tree and wire branches are the attachment points for the sedum limbs.
- Limbs refer to the thicker woody part of the sedum stem
- Leaf clusters refer to the sedum flower heads with leaves attached.
- Branches (as opposed to wire branches) refer to smaller groups of leaf clusters glued to the limbs.
I ended up trimming the wire branches down to get the right spread of the tree. Covering the wire with multiple coats of latex and coffee grounds worked really well. I could freely bend the wire to get access to glue in the limbs. Once attached just bend back into place. Once I figured out what I was doing, work progressed quickly. The shiny parts seen in the photo are the hot melt holding the limbs to the wire branches. Here is the tree with 40 to 50 limbs attached to the wire branches. I made another 40 or so to finish the lower portion of the tree.
Here is a better close up of the leaves. The 3 different super leaf colors look pretty good. Using 60% to 80% of one leaf as a base color and the other two as highlights seems to work best to my eye. I could vary the leaf density by using less leaves and by removing more individual sedum head flowers. Taking too many off looks a little sparse but in the right place looks fine.
What else would I do different? Making the limbs with the branches and leaves is the best way to do this. You have really good control of the leaves and density on individual limbs and branches and you can get extra coverage on the underside of the sedum head. But they are a little brittle. I would spray with an adhesive to get better leaf attachment and fine stem strength once assembled into branches. I have a bottle of modge podge spray to try for coating the new limbs and the already built portion of the tree. I am convinced using the shrink tube to get an initial attachment (branch to wire) is the best way to start assembling the tree.
I found out lightly rubbing the dried flower heads together gets the flower heads off quickly and more thoroughly. Pieces that break off were probably not going to stay on anyway. A brush works ok, but is slower and you have to support the head.
I do like dipping the flower heads in about 3 inches of "scenic" glue. This thoroughly coats the flower heads and a portion of the sedum stem (in hopes it gives a little more strength). I let the glue drain off for a minute or two prior to applying the leaf material. Shake off the sedum stem in a bag or box. Excess glue ends up in the excess leaf material and creates clumps. So I make enough leaf mix to only do 5 or 6 branches to minimize leaf waste. Even if you end up with dry leaf clumps you cannot easily break apart, you now have extra ground growth for elsewhere on the layout. Mixing small batches is also good because there will be variations in each batch creating slight color variations in the finished tree.
Not sure if this is good or bad. After a week or so the latex had cured and remained flexible. Good because it was not damaged by all the wire flexing I did. Maybe no-so-good, because it was relatively easy to pull off the latex from the wire branches meaning there was not a lot of holding power. Of course what will hold fast to thin smooth wire?