Song for Jasmine » Natural pest control

Green Gardening

Tony — Mon, 12 Apr 2010 19:38:20 +0000

my garden in 2009

Is your garden green? Well of course it’s green, it’s got plants in it, that’s not what I mean. How environmentally-friendly is it? Are there things we can we do to make it more friendly, yet still have a good-looking garden?

That’s actually a rather complex question. A garden is a place where we meet nature face to face, where we try to grow things and so does nature. Nature has had a lot of practice at this, and for us to impose our will may take some considerable effort. Alternatively, we could give nature a helping hand, working with it, instead of against it. That way, we can have a beautiful garden which is good for the environment, and which may even take less effort to maintain than we would otherwise expend.

We maintain our gardens with lawn-mowers, hedge-trimmers, fertilisers, herbicides and pesticides. Machinery requires energy (electricity or petrol) to run, and the chemicals we use have to be refined, bottled, and shipped to us. Herbicides and pesticides are obviously not environmentally friendly, they’re designed to kill things after all. Many of them are also harmful to humans, so careless use can have serious consequences for you or your neighbours.

We might think that fertilisers can’t be bad for the environment, after all, they’re supposed to make things grow. But many fertilisers rely on minerals mined somewhere in the world being processed and transported during their manufacture, much like many of the things we buy these days. Fertilisers that wash off the land and into rivers and lakes can upset those ecosystems by causing excess growth of algae, which can in turn kill fish and other aquatic animals. So even fertilisers come with an environmental cost.

cricket on beetroot

So, if we could use less machinery and less chemicals, that would be a great start to making our garden ‘greener’, and save us some money in the process. That’s easy to say, but how, then, do we control weeds and pests?

One easy way to keep weeds under control is with a plastic ground-sheet. This is a sheet that covers the ground, you cut holes in it to plant the things you want. The sheet prevents weeds from growing, and your plants have no competition. You may have seen them at the side of motorways, where they are often used. If your plants are low and spreading, they will soon hide the sheet from view. Otherwise, you can cover the sheet with bark or gravel to hide it.

Another good way to control weeds is with mulch. Mulching means putting garden waste onto the surface of the soil. There it forms a dense mat as it decays, which helps protect the soil from drying out and makes it hard for weeds to grow. Grass-cuttings are ideal for mulch, but you can also use autumn leaves, straw, vegetable peelings from the kitchen, or anything that will pack down densely over time. Mulching also feeds the soil, as the mulch decays and releases its nutrients, just like it would in a compost heap. If you use enough mulch on your garden, you may never need to add fertiliser to your plants, the mulch will provide everything they need. That’s easier (and less smelly) than managing a real compost heap!

Alternatively, if you choose your plants carefully you can get the same effect from the plants themselves. There are many low-growing, fast-spreading plants that are very effective at preventing weeds from getting established. If you have only a small area to cover, hardy alpines will do the job nicely. Your local garden centre can help you choose some that are good for your situation. Once they have covered the ground they need very little maintenance. Plants which are taller than the cover-plants will not be affected, so you can have your roses growing quite happily surrounded by living weed-control.

You can also use plants such as clover and alfalfa, which serve double-duty as green manures. This means that they actually enrich the soil as they grow, so you will need less fertiliser to encourage your plants. Either grow them all year round, or just scatter the seeds on the ground towards the end of summer and let them grow through the winter, then dig them in in spring when you prepare to plant for the coming summer.

orange butterfly

So much for the weeds, what about the pests, such as slugs, snails, and insects? Here the best answer is, more insects! And birds, frogs, lizards, and hedgehogs. In other words, the more wildlife you can attract to your garden, the less chance the pests will have to take over your plants. Pests multiply rapidly when they are safe from predators, so if your garden is teeming with wildlife, there will always be something to keep them under control.

Actually, that’s one reason why pesticides are a bad idea. They kill all species of insect, not just the ones you want them to. But the ones we want to kill will bounce back first, and multiply rapidly. That’s because they have no competition for their food (i.e. your plants) and nothing to keep them in check.

Birds are very easy to attract, just keep putting out food for them. They will still take the insects from your plants, especially in the breeding season, because they feed them to their young. Raising chicks is hard work for the parents, so if they can get a quick snack from your bird feeders and then find a juicy fat caterpillar for their young all in one place, they will appreciate it. We’re not the only ones to appreciate one-stop shopping. If you put up some nest boxes too, you can have resident pest-control working for you, all day long.

Frogs and hedgehogs will eat slugs, and they and lizards eat insects, so they can also be very beneficial to your garden. You don’t need a pond to attract frogs, they will be happy with any permanently damp and overgrown area. A shaded spot covered in weeds might well do the job. They can travel quite a distance too, so you may find them even if the nearest pond or stream is some way away. You can attract lizards and hedgehogs by creating spaces where they can hide from predators, such as piles of stones or branches, or leaving part of your garden overgrown. If you leave such shelters available in the winter, they may hibernate there, so they are ready to go to work for you as soon as the spring sun stirs everything into life. Hedgehogs will come regularly if you put out food to attract them, so why not spread some peanuts around your lettuce instead of slug-pellets?

sunflower

Many insects are also useful for keeping pests under control. Ladybirds and lacewings can control greenfly, so are welcome in the garden. You can encourage ladybirds and lacewings by providing over-winter shelters for them, so-called ‘insect hotels‘ where they can hibernate safely. A greenhouse or garage is a good location for such a hotel, anywhere dry and sheltered, preferably away from the worst of the cold.

verbascum thapsus

It’s also possible to deter the pests from staying in your garden in the first place, by a technique called companion planting, or co-planting for short. Some plants deter pests, so can confer their protection on their neighbours. Others attract insects that eat the pests, so achieve the same result. Some plants actually attract pests, and can be used to draw them away from your preferred plants. Many of these companion plants, such as herbs, marigolds, or sunflowers, are easy to grow, and desirable in their own right.

You can also choose plants that are less susceptible to pests in the first place. Maybe a honeysuckle will go nicely on that wall instead of a climbing rose, which is likely to suffer from aphids. Need tall flowers for the back of the garden? How about collecting seed from Common Mullein (Verbascum Thapsus) and planting that. They look just as good as any expensive hybrid you’ll find in the garden centre, and being a native species, they’re probably more tolerant to pests.

great tit and goldfinch on sunflower

We can also help nature directly, rather than just letting it work for us. Instead of cutting down dead plants and burning them at the end of summer, consider leaving them alone until the seeds have set. Sunflowers look just as pretty with blue-tits and goldfinches hanging from them in October, picking at the seeds, as they do when in full flower. When the time comes to cut them down, why not add the stalks to the pile of branches for your hibernating garden assistants, and place the heads around your roses where they will decay in time to fertilise the new growth in spring. Plant a few late-flowering species to help the last insects of summer. Leave your dandelions alone in spring so they flower, the first bees to come out of hibernation will love them.

If you really want to go green with your garden, and can invest some effort to do so, growing your own vegetables is a great idea. By growing your own you can really cut down your carbon footprint by reducing your ‘food miles‘. That means that, instead of someone in the next country growing the stuff, packing it in plastic, and driving it to your local supermarket, you just get it from the garden, and all that plastic and fuel is not needed.

So, making our garden environmentally friendly is not difficult, it only takes a little planning and foresight. Our own environmental footprint, and the quality of wildlife in and around our garden, can vary a lot depending on the approach that we take. You might even save yourself time, money, and effort, and end up with a more satisfying garden as a result.

field of flowers

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Gardening Update II

Tony — Mon, 07 Sep 2009 19:15:58 +0000

rain

Although we’ve had a heatwave recently here in France, the dominant theme for this summer has been rain. Lots of rain. And yet more

pot-grown beetroot

rain. With all this rain, I’ve not had to water my terrace-garden very often. I was initially concerned that my plants, being on a west-facing terrace, would get too hot. That has not been a problem! Despite this, I’ve had a fair bit of success in the garden so far. We’ve had lettuce and chard in good quantities since the middle of June, and will still have plenty for some time to come. I planted a second crop of both a while ago, and that is giving me a good succession. We’ve also had our first beetroot, as you can see from the pictures here. They weren’t quite the cricket-balls you can get in the supermarkets, but they were certainly big enough for us. As with everything that comes straight from the garden into the kitchen, they tasted great! There are still plenty more out there, so they’re not done yet!

beetroot and chard leaves

The beetroot leaves have been supplementing the chard whenever we want fresh greens. I deliberately planted many of my plants closer together than they say you should on the packet, with the intention of taking a leaf off here and there to keep them from getting overcrowded. This has worked well, more or less, and has allowed me to make good use of the few tubs I have available. Lettuce, chard, and beetroot have rubbed shoulders – or roots – and kept us well supplied. That said, I have to admit that some of the plants were just too close, and I should have left them more room. I’ll know better next year!

lettuce and chard overflowing their pots

Not everything has been entirely successful. The herbs I planted have not grown as fast or well as I had hoped. The thyme has not flowered, which has disappointed me because I was hoping it would attract bees. I think it may have been too cold and wet for it, and it has also been crowded by some of the leafier plants. The rosemary never came up, which is also disappointing because it can provide useful food for bees in winter.

plucked seedlings

I lost a number of seedlings, plucked by birds looking for something to eat. I’m guessing that they may have been younger birds, perhaps recent fledglings learning how to forage, because the damage all happened in a short period of time around the end of June. I’ve not lost any later seedlings this way. If they were adults that pull up seedlings regularly, I would expect to have lost some of my later sowings too.

I also had an attack of powdery mildew on the beetroot leaves. Looking around, it seems that one way to deal with that is to spray the plants with milk! Incidentally, if you go looking for the article referenced on that page, the link they give is incorrect. The original paper was in the journal of Crop Protection, not Crop Science. If your Portugese is any good, you can also take a look at a technical note by the same author, which you can get without paying for it!

I’ve mentioned the ants on my sunflowers, they were farming aphids. I read in several places that mint deters ants. Not having any mint to hand at the time, I put down the contents of a few mint tea-bags, and that seemed to do the trick! That same link actually advocates planting sunflowers so the ants will herd aphids onto them, taking them away from other plants. I didn’t read that bit first time round, it seems there’s more to companion-planting than meets the eye!

peas

The peas I planted actually produced some decent pods. I think I will try a few more next year, cascading out of the pots where they will not compete with other plants. The spring-onions are doing well too, as is the basil, of course. We have been having some very good salads lately!

We have 6 large tubs for our terrace garden, plus a number of smaller pots, which provide a good deal of growing space. We shall add more tubs next year. We paid more for the pots and soil than we have saved on the food we have grown so far, but I think that it will only take 3 or 4 years to pay back the initial investment. Meanwhile, we’ve been able to go shopping less often, saving us time, and money on petrol, and we have been able to supplement our table regularly, with good-tasting, pesticide-free produce. All things considered, our first summer of organic terrace gardening has gone very well so far, and it’s not over yet!

(part of) my garden

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Gardening update

Tony — Fri, 19 Jun 2009 17:47:18 +0000

spring onions

Back in April, I described my gardening plans for this year. Time for an update! It’s been seven weeks since then, so I ought really to be well advanced with my plants. Unfortunately, we have not had access to our terrace all that time because of work that needed doing on it, so I’m rather behind with the schedule. Still, there is progress to show, and here it is.

I bought the seeds, here they are, most of them. I was interested to see that some of the seeds on offer were ‘certified organic’, like the beetroot here on the left. I’d never heard of organic seeds before, but if that means they don’t use pesticide or fertilisers to raise the stock, that gets my vote.

seed packets

more seed packets

pots on terrace

I also got some big pots. I have had the white one you see here for some time, and I recall it was expensive when I got it. It seems pots still are expensive, which is why I’m not getting more until I am convinced I can produce something in them. The brown pots are huge, they hold 120 litres of compost each, that’s over four cubic feet. I would have preferred white pots that would absorb less heat, but despite the number of garden centres in our area it’s not easy to find something suitable. Large pots will hold a lot of water, so plants will survive better in the summer heat. Our balcony takes the full force of the summer sun, so that’s an important consideration!

lettuce

Our local organic store, Satoriz, now sells organic compost, which is a great idea. It’s good stuff, but it can’t be used on its own because it needs something mixed with it to help it drain well. On its own, it tends to pack solid when its wet, forming a solid layer like a dried-up river bed. That’s not good because the soil doesn’t breath or absorb water properly when it’s like that, it needs to be open and porous. Still, it’s good to know that ‘organic’ is really entering every part of the home-food-growers’ domain, and I will definitely be using this compost as a regular part of my gardening.

chard

When you fill a pot as big as these with new soil, it’s a good idea to make sure the soil is thoroughly wet before you plant anything. The compost sold by garden centres is normally very dry so it weighs less, people are more likely to buy it if they can carry it. When it’s that dry it can take a lot of water to soak it thoroughly, these big pots actually took 30 litres of water before anything drained out the bottom, that’s one quarter of their volume in soil! I watered them 3 or 4 times over a day or so before I was happy enough to plant in them.

beetroot

The lettuce is growing strongly, as are the chard and beetroot. I’ve already thinned them out, but I may still have to thin the lettuce some more, they’re growing very vigorously. The spring onions have sprung, as you can see at the top of the post. You can see a sunflower growing well in the white pot above, but I can’t take the credit for that one, it’s a seed that found its way into the pot somehow and sprouted without asking permission. The sunflowers I planted are a dwarf variety, they shouldn’t grow to more than about 18 inches/45 cm high, and you can’t see them over the edge of the pot yet.

nasturtium

peas

I also have some peas coming through. I had not intended to plant peas, but we bought some for eating and there were a few that were sprouting, so we thought we’d give them a try. They’re doing very well, in fact they’re currently the biggest plants I have out there.

The french marigolds are doing well, and I did plant nasturtiums, which have also come up. The thyme, sage, rosemary, and basil have sprouted too, but they have been a bit disappointing with their germination, slow to come through and slow to get on with the job. The mint hasn’t come up at all, but that’s my only no-show this year, so I can’t really complain.

ants on sunflower

Since the herbs were supposed to be our organic pest-deterrent, that leaves the other plants a bit vulnerable at the moment. The sunflower that that seeded itself is harbouring aphids, which are being looked after by ants. That’s not good, so I need to do something about them, and would welcome any suggestions for dealing with them. I’m pretty certain the ants aren’t nesting in the pot, there are only a few of them, so I don’t have a nest to eradicate, just a few visitors.

Fortunately, other characters, such as this enormous slug, have not found their way into my little garden. That’s one advantage of an exposed, hot terrace, it forms a natural barrier to some pests. I don’t think my lettuce would last long if this guy found them!

slug

So I’m not competing with the local farmers yet, but even since I took these photos a couple of days ago the plants have grown quite a bit. It won’t be long before I’m getting a few lettuce leaves at least. I know other people out there who are blogging about their organic gardens, The Natural Patriot has already started harvesting goodies from his. The Earth Home Dwellers are having a go too, but I don’t know how they’re getting on. C’mon guys, tell us, I’m curious!

If anyone else is growing their own organic vegetables out there I’d love to know how you’re doing?

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Meanwhile, in the garden…

Tony — Mon, 20 Apr 2009 20:11:52 +0000

wild primrose

Easter has come and gone, and those of you lucky enough to have a garden may well have been out in it planting things. I don’t have a garden, and my mum is probably raising her eyebrows right now because I didn’t get that much done in hers over Easter, but I do have a terrace, and I am looking forward to trying my hand at growing a few plants this year.

I’ve grown vegetables in pots before, but not without pesticides and fertilisers. This year will be different, I intend to follow the growing trend and see how well I manage without chemical assistance. If it’s good enough for Michelle Obama, it’s good enough for me!

Michelle Obama wants to plant an organic garden in the white house lawn, and apparently this is upsetting the agricultural chemicals industry in the US. They are concerned that it sends the wrong message because it is organic. This despite the fact that more and more people out there are moving away from pesticide use. The fourth Semaine sans Pesticides (‘week without pesticides’), just last month, was twice the size of the one last year.

: Image via Wikipedia

14 countries participated, from Canada, South America, Europe, and Africa (a summary is available online). Pesticides are nasty chemicals, and it seems a lot of people, the world over, think we can do without using so much or so many of them. But how?

Fortunately for the small gardener, there’s a lot of good information out there about natural pest control, such as using coffee to repel slugs and snails, using neem oil as an environmentally-friendly pesticide, companion planting, for mutual pest-resistance, selecting plants to attract useful insects, and growing vegetables in pots. I’ve even read some of it, and have decided what I want to grow this year.

I want to grow lettuce, beetroot, chard, and spring onions. Beetroot leaves are good in salads, so they’re not just for the roots. I also want to plant a few herbs (basil, thyme, rosemary, mint), as much for the smell as anything. I’ve chosen these plants for a variety of reasons:

they’re easy and fast to grow, so I can hope to get something quickly
for the most part, they’re cut-and-come-again, so I can hope for a long season
lettuce and chard, in particular, don’t keep too well in the fridge. By growing my own, I hope to have them fresh whenever I want them.
they don’t need staking, so occasional high winds and storms won’t damage them (I hope)
in the event of a disaster (hailstorm, heatwave, locusts, whatever) I should be able to replace them rapidly

Jasmine with carrot

Incidentally, if your parrot likes beetroot, do bear in mind that it retains its colour as it passes through the digestive system of your feathered friend. Jasmine liked beetroot, but the first few times we gave it to her we were a little concerned about the red droppings at the bottom of the cage a few hours later!

I also want to grow some flowers, partly for the colour but also for the local birds and insects – some of them anyway. The local bees will probably like the thyme, and I’m sure they’ll go for sunflowers too. The sunflower heads will be kept for feeding the birds later in the autumn and winter.

The minimal research I’ve done so far suggests that french marigolds are good at deterring aphids, so they’ll be very much in evidence, in and around the other plants. Nasturtiums are easy and, if I am to believe what I hear, edible too, but I’m not convinced. Maybe I’ll try them, maybe not.

I don’t intend to be too ambitous with my gardening this year. I won’t have a great deal of time for it and I’m not expecting to save a lot of money. I do expect to grow some tasty food, and to have a lot of fun in the process. I’ll let you know how it goes!

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