There is an old adage “Feed the soil, not
the plants” which makes sense to me.
Here is how I go about it.
Fertilizers Nowadays
I grow my veg adding no artificial fertilizer, and minimal amounts of natural fertilizer
to the soil. My aim is to eventually add none at all. I haven’t always done it
this way. I still have half a tub of Growmore in the shed that I used to
sprinkle around every now and then, if I remembered, before sowing or planting.
But then I read somewhere that soil which has received a lot of artificial
fertilizers tends to see a diminishing earthworm population. I haven’t seen any
serious research to back this up, but I don’t want to take the risk – I need my
worms! (And anyway, on a point of principal, natural must be better than
artificial.)
I subsequently bought a pack of Fish,
Blood & Bone granules, and a tub of organic chicken manure pellets (organic
because I don’t want to support battery farming in even the smallest way). My aim is to use these only as a
transitional measure, until my rotation has gone a full cycle, and each of the
quarters has been enriched with manure.
However, my soil is very light and riverbed
silty sandy, so nutrients leach away more rapidly than would be the case on
heavier soils. I am not sure the effects of the manure will still be felt 4
years on. So the soil at the end of the rotation
may well need some kind of boost – especially the root beds for which the manure
will be an ancient memory. Hopefully
I will eventually have enough compost to afford to give the roots a couple of
inches before sowing or planting. I don’t yet though.
DIY Fertilizer - The clever legumes The
rotation I am using at the moment delivers 5 crops in a four-year cycle
Potatoes
– alliums – legumes – brassicas – other
The legumes occupy the soil 1 or 2 years
after the potatoes, when there should still be enough residual nutrients in the
soil to get them going. But legumes have the amazing knack of catching all the
nitrogen they need from the air. Not only that, but they squirrel it away in
their roots for the future.
This means that after the peas and beans
have been harvested, I can cut the stalks off at or just below soil level, and
leave the roots there. The following crop will be a brassica, which will
happily use up the nitrogen released to the soil as the legume roots rot away.
Clever little legumes!
After trying this approach last year I
have realized that it is doubly important to keep the pea and bean beds well
weeded. If there is a mass of weed once the legumes have been harvested and the
stalks cut down, it is very difficult to avoid pulling out their roots while
weeding. French and runner beans, and peas are fairly easy to deal with. But
the broad beans are harder, as I grow them in a block into which
it is difficult to reach to weed. Maybe I should cut the stalks down twice –
once leaving about 6 inches, then weed, then the final cut to soil level.
Soil Improvers There
are many different kinds of soil improvers – some free, some expensive, and
some better then others. The main thing is to get as much as possible into the
soil. These are the ones I have
used.
(a) Home
Compost I
compost all of my kitchen waste, except for meat or fish remains (which would
attract rats). I don’t have a
lawn, but I have some neighbours who do, and I have persuaded them to give me
their lawn mowings rather than pay for a brown bin. I ask only that they don’t give
me the first cut of the lawn after any sprays (moss killer, etc) have been
used. I also take from them any
other compostable garden waste, eg old bedding plants, autumn leaves, etc. I
ask them not to put in anything thorny, such as brambles or roses, that might
cut my hands. Anything that is too
woody to compost I put aside for the wood-burner.
I don’t turn my compost. I don’t add lime, or any extra water,
and only pay the slightest attention to balance of brown and green. Neither do
I stack things up in piles to make a heap when ready. Everything goes in at the time I need to dispose of it. I
empty the entire teapot, stale tea as well as teabags, into it every morning. I
also wash out the kitchen compost bin and empty that in too. These two actions seem to keep the compost sufficiently moist. Each time I add
kitchen waste, or lawn mowings, I scrunch up some newspaper and throw it in to
add balance. This laissez-faire system has always worked for me, but then with 3 bins, I don't need to be in a hurry.
I have three “dalek” compost bins, and
when one is full, I leave it to mature and move on to the next. I have learnt
that we need some sign to indicate which bin to use, otherwise other family
members get confused and throw kitchen waste into maturing bins. After a month
or 2, small red worms, called brandling worms, magically appear and colonize
the bin. (I have no idea where they come from – this happens even if the bin is
sitting on a concrete base!). (My
bins rest on a base of chicken wire over soil, to discourage rats, which like
nothing better then to set up residence in a nice warm compost bin over the
winter.)
After about a year, the bin is ready. The
contents will, depressingly, have shrunk to about a third of their original
size, but will be sweet-smelling, brown and crumbly. The only thing still
recognizable are the fragments of eggshell, which I leave, and the inevitable
bits of plastic and metal (eg bottle tops, chocolate wrappers etc), which
always seem to find their way in.
I use this compost if I need something I
I hope will not have many weed seeds, such as the asparagus bed, or
the seedbed.
(b) Leaf
mold Every
autumn I collect 30 or more bin bags full of leaves. There is an area of town I regularly drive through which has
broad avenues lined with huge, majestic sycamore trees. When they shed their
leaves, I fill the back of Clio (our hatchback) with 9 or 10 bags full at a
time. If I time it right, usually
mid-November, the council will have swept the leaves into piles ready for me,
waiting to be collected.
The traditional way of using leaves is to
make leaf mold rather than composting them. The easy way to do this is to water
the leaves in the bin bags, tie the top, punch a few holes all round and leave
for a year or two. Leaf mold is
meant to be good to improve the texture of the soil, but does not contain many
nutrients. I have tried this in
the past, but nowadays I use the leaves in a different way.
(c) Chicken compost Instead of making leaf mold I throw a bag or two a week of the leaves at the feet of my hens. They get very excited about this, and
scratch away for hours looking for titbits. I also throw them any remains from spent vegetable plants,
weeds, (except perennial roots or seedheads), and the bedding straw when I
sweep out the chicken house. I
even throw in the stalks of old brassica plants, though after then hens have
picked them clean I remove them to dry for burning. (It is possibly to mash
them to smithereens with a mallet and then add to the compost, but burning
works for me.)
The hens scratch and peck and pee and poo
on all of this, breaking it down and mixing it up, and accelerating the
composting process enormously. Gradually the soil level rises as more and more stuff
get thrown in. A bye-product of
this approach (I hope) is that in this way the chickens are constantly living
on a new surface underfoot. I haven’t the space at the allotment to move them
to a fresh site every few months, as recommended, to avoid a build up of
pests or diseases. By constantly introducing fresh organic matter for them to
tread in, I aim to give them fresh ground underfoot all the time without
actually having to move them.
Then every few moths I dig the chicken
run down to the original soil level, and barrow the contents to one of the compost
bins. (At the allotment I have four bins made of old wooden pallets, secured in
place by wooden stakes through the corners.) At this stage it consists of a
sodden mess in various stages of decay, with a typical chicken manure whiff to it. However,
after a few months it has changed into beautiful, brown, crumbly, compost. I know that it is likely to contain a
fair few weed seeds though, so I use it where that is not so critical. For
example I recently used the chicken compost when making planting holes for this
years cucurbits (cucumbers, squashes, etc)
(d) Animal
Manure I
also import manure from outside.
Contrary to popular belief there is a lot of manure around for grabs:
cow farms out of town, and riding stables in town being the most likely
sources. The only problem is getting the stuff from the farm or stable to the
allotment. (Mrs Spud is tolerant of
Clio often containing allotment odds and ends, but even she draws the line at
using it to transport sacks of stinking manure.) One year I paid someone with a
pickup to collect from a nearby riding stable. Last year a friend offered his
trailer and together we filled 50 bags of cow manure from a farm and delivered them in 2 loads.
(Incidentally I would recommend keeping
the manure in bags while it matures rather than emptying it into a heap. It seems to rot down equally quickly,
or at least quickly enough, and saves a lot of effort when it comes to carrying
it the beds.)
A word of warning when it comes to
importing manure: there have been a few cases of manure being contaminated with
a particularly persistent herbicide recently. As a result some allotmenteers
have found their plots sterile, at least temporarily, after applying this
tainted manure. I would hope that the cow farmer would know if his manure is
dodgy and not pass it on to us. I’m not so sure that stable owners would know so
much about their straw though. If in doubt I suppose it would be best to try
some out for growing on a small scale first. Personally I have never bothered
and not had any problems.
I use imported manure exclusively on my potato beds.
(e) Brown
Bin Compost Nowadays
most councils collect (for a fee) garden waste in brown bins. This is then
taken to a central depot where it is all shredded and composted into compost,
sometimes sold in garden centres as “soil improvers”.
For a while our council allowed
allotmenteers to collect as much of this as they wanted from the depot for
free, on production of the allotment contract. So for a couple of years I filled Clio with bags of the
stuff, a dozen or so at a time.
(Matured compost like this was much less offensive then manure.) I probably overdid the weight though,
and at times was resting on the suspension, so had to drive very carefully to get it
home.
However, a couple of years ago, when
money became tighter all over, they started charging. It was still quite
reasonable – about £10 a ton – but unfortunately they wouldn’t let me collect
my ton in 4 visits. They used a weighbridge, and I would have had to pay the
same no matter how little of the ton I had managed to load on each time.
Nevertheless that is still an option for the future. I wonder how Clio would
fancy a trailer?