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the Set D rowans
Posted on April 16, 2011 by Ash
I’m afraid I have been rather lax of late in sticking to this blog’s original purpose of charting the development of the treeblog trees. There have been some pretty important developments over the winter, yet I’ve hardly mentioned a thing. I badly needed to turn over a new leaf, so I have carried out a full census of the trees to provide a snapshot overview of the treeblog population as it is today. It may send you to sleep. Here goes :
The two Scots pines (Alpha & Gamma) are alive and well. They last appeared in an update in June. (Nearly a whole year ago?? Can that be right??)
post-Set A willow
The PSAUS is alive and coming nicely into leaf.
Fifteen of the downy birches are alive and coming into leaf: Nos. 1, 2, 4, 5, 10, 13, 14, 15, 16, 21, 22, 23, 25, 27 & 30. Since the last update in August, No. 28 has gone missing from its pot (possibly squirrel-related).
I’ve cocked up big-time with the Set C(r) rowans. At the end of June I planted the nineteen ‘Whitwell Moor’ seedlings (Nos. W1 – W15 & W17 – W20) and twenty ‘Upper Midhope’ seedlings (Nos. U1 – U20) out in individual pots. Each seedling was identified with a little flag made out of sellotape and a cocktail stick. Disastrously, during the winter many of the cocktails sticks have rotted through and these flags have blown away. Which means I have a large number of seedlings that could have come from either the Whitwell Moor rowan or the Upper Midhope rowan. Which kind of defeats the object. I think these identity-less rowans will have to be released from under the treeblog umbrella. The remaining identifiable Set C(r) rowans are Nos. W2, W6, W7, W11, W12, W14, W15, W17, W18, W19, U2, U5, U7 & U14: ten Whitwell Moors and four Upper Midhopes. Doh! I think the Upper Midhope population will have to be topped up from the reserves still in the seed tray.
Both the single normal beech and the single cut- or fern-leaved beech remain alive and well. They last appeared in an update in June.
In the last update in May, there were nine Oaken Clough rowan seedlings (O1 – O9) and seven Whitwell Moor rowan seedlings (W1 – W7). Today all nine Oaken Clough seedlings are alive, but two of the Whitwell Moor seedlings have died (W3 & W4). There are plenty of reserves still in the seed trays, so these populations can be topped up.
OK… I think I’ve cleared all that up as best I can. Here’s a quick summary of what is currently alive and accounted for in the treeblog stables then: 3 grey alders (Alnus incana); 2 Scots pines (Pinus sylvestris); 1 cider gum (Eucalyptus gunnii); 15 downy birches (Betula pubescens); 33 rowans (Sorbus aucuparia); & 2 European beeches (Fagus sylvatica)… which gives a grand total of 56 trees spread over 6 different species. [Plus the honorary treeblog tree, the PSAUS, which is a willow - possibly a goat willow (Salix caprea).]
Posted on May 18, 2010 by Ash
1. The cut-leaved beech (Days 213 to 228)
The terrific Set D(b) cut-leaved beech on the 1st of May (Day 213)…
…the 11th of May (Day 223)…
…and the 16th of May (Day 228) – Sunday. Here come the first pair of true leaves!
I thought there was no hope, but I replanted it anyway.
(You can see where this is going, right?) Well, my optimism was rewarded! I checked on the treeblog stable this very afternoon (Set D(b) Day 230) and look what miracle awaited me:
Yes!!! The only germinating beechnut collected from the beech at Wigtwizzle has survived!
Oaken Clough rowans Nos. 1 to 4 (O1 to 04).
Rowans O5 to O8.
Rowan O9 and Whitwell Moor rowans Nos. 1 to 3 (W1 to W3).
Rowans W4 to W7.
Photos taken on Sunday (Set D(r) Day 36).
Set C(r) rowans transplanted. Six rowan tricots. Set D rowans planted. The fate of the Set D beeches and sweet chestnuts.
Posted on April 12, 2010 by Ash
The transplanted Set C(r) rowans (Sorbus aucuparia) yesterday, minus the tricots.
Yesterday was a busy day for treeblog…
The first five Upper Midhope rowan seedlings, U1 to U5, en route to the plug tray.
The plug tray as a bird would see it. May they live long and prosper.
The first five tricots, WT1 to WT5, en route to their plug tray.
A closer look at WT1…
…and WT2 and WT3 and WT4 and WT5. Marvellous.
The germinated Oaken Clough seedlings, freshly removed from the pretreatment plant pot and ready for planting.
F1: one germinating cut-leaved beech nut. Yes!!!
These three germinated beechnuts I planted in pots. The damaged beech will just shrivel and die; it has expended all of its energy on a root that is now not there. The cut-leaved beech trapped in the cupule will probably die from being unable to escape its prison. Now all of treeblog’s beech hopes and dreams rest on the shoulders of one cut-leaved beech. No pressure or anything.
Posted on October 13, 2009 by Ash
So I’ve (1) collected and (2) pre-pretreated treeblog’s Set D rowan seeds. Now they are undergoing (3) pretreatment before I (4) plant them in the spring. The last time I planted rowan seeds – for treeblog Set C – I neglected to pretreat them and my folly was rewarded by a total absence of germination. (So far… A year of ‘natural pretreatment’ and they may yet germinate alongside the Set D seeds!) This time I am boosting my chances of success by trying out three different methods of pretreatment advised by the Forestry Commission in their Practice Guide Growing trees and shrubs from seed by Peter Gosling (2007) [available online in .pdf format here].
A. “Easy: natural (outdoor) pretreatment / sowing with medium”
A. On Saturday I filled two small plant pots with a one part compost, one part sand mix. Into one pot I mixed a third of the Whitwell Moor seeds; into the other I mixed a third of the Oaken Clough seeds. I’ve placed the two pots outside where they are open to rainwater but should avoid large fluctuations in daily temperature. There they shall remain until spring. Sixteen to thirty weeks from the 10th of October gives us a planting window open from the 30th of January to the 8th of May. I’ll probably plant all of the Set D rowan seeds proper in March.
B. “Moderate: artificial (temperature controlled) pretreatment with medium”
B. On Saturday I filled two empty yoghurt pots with a one part compost, one part sand mix. Into one pot I mixed a third of the Whitwell Moor seeds; into the other I mixed a third of the Oaken Clough seeds. I’ve placed the two open-topped pots in the fridge where I’ll ensure that they remain moist until spring.
C. “Skilled: artificial (temperature controlled) pretreatment without medium”
C. On Saturday the 3rd of October I started separate 48-hour soakings of the Whitwell Moor and Oaken Clough seeds. I rinsed the seeds two or three times during the 48-hours. A week later (last Saturday), I transferred the surface-dry seeds to two small polythene bags and placed them in the fridge.
* * * * *
So there you go. Will the seeds make it through the winter? Will any of them germinate next spring? Will there be any difference between the Whitwell Moor and Oaken Clough seedlings? Which method of pretreatment will be the most successful? Only time will tell!!!
Posted on October 3, 2009 by Ash
Looking into the canopy of the Whitwell Moor rowan. [Photo: 12 Sep. ‘09]
On Saturday the 12th of September I went for a late summer’s wander with my father. The weather was beautiful, the scenery was stunning, and our route just happened to pass by a couple of special trees: two rowans from which we collected berries to plant for treeblog’s Set D, one on Whitwell Moor and one overlooking Oaken Clough high up in the Ewden Valley.
Berries on the Whitwell Moor rowan. [Photo: 12 Sep. ‘09]
I previously collected berries from the Whitwell Moor rowan in autumn 2008 which I planted as part of treeblog Set C this spring (along with berries from another rowan, downy birch seeds, and sweet chestnuts), then replanted as Set C-r on the 12th of May. None of those seeds have germinated to date, presumably because I never pretreated them before planting them - something I didn’t realise was necessary. Without the pretreatment they still ought to germinate, but a whole year later rather than in the same year like I expected. So treeblog is expecting rowans from both Set C and Set D to germinate in spring 2010!
The Whitwell Moor rowan on the day of my Set D berry collection: the 12th of September 2009.
I discovered the Oaken Clough rowan this summer on the 18th of July. When I first lay peepers on it I knew that it had the biggest girth of any rowan I’d ever seen. I measured it on the berry run: 3.4 m (11 ft 2 in.) in circumference at about shin height. That gives a diameter of 1.1 m (3 ft 7 in.). These figures might not sound very impressive, but for a rowan they are well impressive. Unfortunately, this monster of a rowan has suffered a catastrophic collapse. Most of the collapsed boughs nevertheless remain alive, and since this incident the tree has put out a lot of new growth. There’s no reason why it shouldn’t keep on going for many years to come.
The Oaken Clough rowan. Massive yet collapsed. [Photo: 18 Jul. ‘09]
After I’d picked my berries, I sort of forgot about them for a couple of weeks. I just couldn’t stomach the upcoming task…
The Oaken Clough rowan berries. The black ones have gone bad. [Photo: 20 Sep. ‘09].
Then last week I got around to removing the seeds from the berries. This was a long, time-consuming process. I estimate it took me four or five hours, and that was only working with about half of the berries! The other half had gone rotten because I’d waited so long to act. I should have removed all of the seeds when the berries were fresh, but then ten hours of seed extraction would have sent me pathologically insane. Whatever, the outcome is I have plenty of seeds.
The Whitwell Moor rowan berries. [Photo: 20 Sep. ‘09].
This afternoon I removed any bits of husk still attached to the seeds. How nice and clean they look!
The clean extracted rowan seeds earlier today. The Oaken Clough rowan’s seeds appear to be slightly larger than those of the Whitwell Moor rowan.
Right. Now the seeds are all ready for pretreatment. To improve my chances of Set D success, I’ll be trying out not one, not two, but three methods of pretreatment. My two piles of seeds will be split into thirds, and each pair of thirds will undergo a different method of pretreatment. These methods are laid out in a Forestry Commission practice guide, and an upcoming post will detail what they are. The pretreatment has actually already begun for one pair of thirds: they are currently being soaked for 48 hours to rinse off any germination-inhibiting chemicals!
Posted on September 17, 2009 by Ash
Dyer’s mazegill (Phaeolus schweinitzii) at the base of a Scots pine (Pinus sylvestris).
This post shall send prose to his room and welcome poetry into the drawing room for a brandy. Let me spin thee the tale of last Saturday:
A Late Summer’s Wander
A holly (Ilex aquifolium): the last tree before Pike Lowe.
A stunning berry-laden rowan (Sorbus aucuparia) near Ewden Force.
And another. The rowans around here, while absolutely covered with berries, had more or less lost all of their leaves already. Rowan berries seem to be much more abundant and redder than usual this year. I’m loving it.
A shady pool in Oaken Clough. Danger! Midges!
Looking across the Ewden Valley to Thorpe’s Brow on our way home.
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