Mulching away

I’ve been having trouble with my mulched areas. I love the idea of using mulch to drive back the weeds and feed the soil, however I haven’t quite cracked the practicalities.
For example:
I like using cardboard as a sheet mulch to keep grass and weeds away from newly planted shrubs and trees in the garden. It works very well as a simple solution up to a point. If the area is to revert back to grass as in the case of the field trees, it’s fine. I use brick sized stones to keep the cardboard down, which works much better than I expected against the winds we get. By not covering the cardboard, the surface keeps drying back out and it lasts up to a year without too much degradation. You need to make sure that any bits of tape and plastic labels are removed, since these do not disappear like the cardboard does.

DSCN2478
New beach plum in cardboard mulch a few months on

The problem I have is that this does not fully work against creeping buttercup, which is almost everywhere. The buttercups then spread over the mulch, and if you are foolish enough to enjoy the flowers, they seed everywhere, and you get a lovely ground cover of buttercups! These are probably one of my least favourite weeds. The roots are so persistent, and it is too easy to pull the top off, leaving the crown (which will regrow) behind. I’ve been struggling in the tea garden, which I have fully mulched over the last two years or so. I have five stages in progression: Bare soil exposed from removing the excess soil for terracing the orchard; Reasonably intact cardboard mulch, which is gradually being reclaimed by buttercups; a rather mature buttercup mulch where the cardboard has fully degraded; an area weeded in early summer and replanted with himalayam strawberries (which I hope will replace the buttercups as a living mulch – they are fighting it out at the moment); and an area, which was replanted with root crops – (salsify, scorzonera, skirret and also the maca).

This slideshow requires JavaScript.

The idea of the root crop area, was that since they would need digging up in the future, I could take the opportunity to weed out the buttercups at the same time. Maybe I should have just left it till that stage, however, as well as the new buttercup seedlings and buttercups creeping in from the edges, I also noticed a lot of little dock seedlings, and (the little pink flower like londons burning) that seeds around so much. I couldn’t take it and had to start clearing the weeds early. I have left the corpses thickly around selected plants. However, since the weather has been wet and mild, unhappily the weeds have carried on growing. I’ll have to remove them and put them in the compost bin.
The new raspberries that I planted there didn’t do too well last year, only a few canes survived through to regrow. I noticed new shoots coming from the autumn bliss ones, so hopefully they will do better next year. I’m not sure why they struggled, but the survivors now seem happy enough. They should be sheltered enough there. It hasn’t been as good as I hoped in the lee of the barn. It seemed like a midge haven, but obviously they are tougher than the tea plants!
The other area which I mulched in a different way, and have been readdressing, is the orchard area to the right of the path as you look downhill. I covered around the trees and blackcurrant cuttings with cardboard, as usual, then used all the lovely cut grass from the pathways to cover the whole area thickly, including the area of card. Unfortunately it looks like it wasn’t thickly enough, since grass is now growing though in most of the area outside the cardboard sheets. I have tried mortal tree’s suggestion of lifting the mulch back over the growing shoots and adding a bit more mulch (https://mortaltree.blog/2013/06/16/group-and-conquer/). At the moment however, it just looks as though I’ve been feeding the couch grass! I think that the area of card will decompose more quickly as well – being covered in damp retaining material. I wasn’t expecting to achieve weed free straight away, since I know there is couch grass, docken and nettles as well as the ubiquitous creeping buttercup. But am a little disheartened. I’ve used up my stock of cardboard sheet to make a light proof layer and remulched with fresh grass cuttings (yes, he’s cut the pathways again) between the trees and the trackway, although I didn’t quite have enough cardboard to finish as far as I wanted to mulch.

DSCN2510
Remulching the orchard area with cardbaord under cut grass

The only weed excluding mulch that does seem to have done pretty well is the floor underlay from the last time the hall flooded, which we were able to reclaim. It is a very thick black plastic sheet, with a slight felt on one side. I’ve laid some on the drive bank to clear back the horrid creeping grass there. I’d like to get the top bank planted, but also need to build a retaining wall to stop it all falling back into the drive again. S. wants to resurface the drive along there, and it makes sense to do that first before building the wall. We removed the sheets to scrape back the soil where S. thought it was encrouching on the drive and I’ve been pleased by how little has been growing back. I used stones, old tyres and fenceposts to keep the sheet down, and that was the only problem I had – it did tend to catch the wind exposing the soil again.

DSCN1143
Effective black plastic mulch on driveway

If the hall floor needs replacing again, as seems likely, we’ll try and get hold of some more of that sheeting. I wonder if it would work for a water proof membrane for a green roofed car port….I’ll have to think about that.

Advertisements

Holmisdale in May

t always amazes me how much things grow during May.  The field goes from a thatch of last years’ dead grass to a sea of pignut, grass and bluebell flowers.  I’ve selected a few of the latest photos to capture May and some of the ongoing activities to do with the trees and the tree field’

DSCN0786
Hawthorne in blossom

This tree is actually in the front garden and was planted in 2008.  It has been flowering for the last three years, last year it set quite a few berries.  I made some hawthorne blossom cordial this year following roughly the same recipe as for elderflower cordial.  It’s supposed to be good for the heart and digestion.  Not a strong flavour, maybe a hint of apples over the lemon that is part of the recipe.

DSCN0751
Worrying lack of leaves on birch

Last year we started to see a problem with several birch trees.  They had previously grown well bar a bit of die back.  This however is more than just die back!  They do seem to be alive, but the twigs are mainly dead with just a little new growth.  I’m going to contact the Woodland Trust over this for some advice.  Some of the birch seem fine, and others from different planting years are like this to a greater or lesser extent.  I need to do a bit of a survey and see if I can tell whether it is betula pendula (silver birch) or betula pubescens (downy birch) that is affected (or both).

DSCN0702
Flowering pine tree

This is the second or third year that these pine (also from 2008) have flowered.  I’m not sure if it is a lodgepole pine or scots pine.  I have to admit I find the new growth on the pines rather phallic in habit!  The red tips are the female flowers (that might develop into cones) and the orangey- brown fingers are the male catkins.  Note the wind scorched older leaves.  I think this is a scots pine, since what I think are lodgepole pine elsewhere are almost defoliated by the salt wind in the winter.

DSCN0698
Monkey puzzle in mulch mat

I’m hoping I don’t regret using this carpet underlay as mulching material.  It seems almost ideal – it is from our house in Solihull and was under the most disgusting deep pile orange carpet (that when taken up we used as bearskin props in a ‘flintstones’ scene once, but that’s another story) so reused.  It is made predominately from felted jute fibres so biodegradable.  It is permeable, so will let the rain soak through for the trees, but is mostly thick enough to exclude light and smother out the grass and other plants around the little trees.  The only downside I’ve found is that it is only mostly Jute.  It also has a very coarse scrim of polymer fibres, presumably to give it strength (or maybe mouldability – I used to work on automotive carpets which were heat formed).  These will not degrade in the short term.  I suspect that the grass will grow through and over the mat in the next year and the fibres will be concealed but ever there…..suggestions welcome.

DSCN0693
Pignut blossom

This is just a picture showing the density of pignut, conopodium majus, in the tree field.  It is a native wild flower here.  I have only tried the tubers raw so far, and although pleasant to eat, they tended to give me a slightly nauseous feeling afterwards.  I haven’t tried it cooked.  I love the dainty blossom which is like miniature cow parseley (of which there is very little in this area).  It’s not in full bloom yet, but quite lovely.

DSCN0690
Landrover mulch

This patch is where one of our Land Rovers (Lara the croft rover) had been parked for about two years previously.  The grass has been entirely shaded out, but there is plenty of pignut and creeping thistle as well as sheeps sorrel and a few buttercups that have survived, all coming back after about a month.  Perhaps an example of mortal tree’s ‘a bit blunt’ method of mulching.  I don’t think I’ll be encouraging more long term parking in the tree field however….

DSCN0688
Bluebell river

The bluebells (hyacintha non scripta) are just about at their peak at the end of May, start of June.  They have done really well this year.  You can see how they are concentrated at the field edge where there is the remains of a stone wall and ditch, so probably not well ploughed.  They also survived several years of being grazed and trampled by sheep prior to the trees being planted (these in 2011).  Compare to next door’s grazed field – I bet there are bluebells under there as well!  Also you can note that they are quite happy in the sunshine.  The ground is so damp, they don’t need the shade of trees on Skye.  When we bought the land, I couldn’t even tell that we had bluebells.

DSCN0682
Buttercup mulch

I found this plant growth quite amusing.  This is one of my ‘orchard’ apple trees, which actually bore an apple last year – although it disappeared before I had a chance at it (crows, wind, dogs….).  These trees were all mulched last year, with my favourite sheet  mulching method – sheets of cardboard from our shop, overlapped and weighed down with suitable stones.  This is quite effective, and lasts about a year.  It is quite obvious that it has worked well on the grass, but less well on the buttercups!  Whether these were not killed (they do sprout right through when buried in a few inches of soil) or have just spread over the cardboard more quickly than the grass, I’m not sure, I suspect the former.  I don’t know whether the buttercups are going to be a problem with the trees however.  We try and get rid of the grass mainly because of it’s alleopathic effects – it is known to have a detremental effect on tree growth for this reason, rather than direct competition for resources.  I think I’ll try and mulch the trees again anyway, since they are still very small.  I still have quite a bit of earth moving to do in the orchard area.  I’d like to try and finish the landscaping here this year, so I can get on with underplanting the trees next spring.