How do I find out what’s killing my plants?

by Alasdair on May 17, 2013

In this case the culprit was mould out competing the grass but we had to take samples to find out for sure.

In this case the culprit was mould out competing the grass but we had to take samples to find out for sure.

From time to time we get asked questions like ’The plants in my garden have all died, what’s killing them?  Does this indicate contamination of some kind?’.  The answer is ‘Possibly, but we’ll have to ask you a bit about it and maybe get some analysis done to be sure’.  As any gardener will tell you plants need care and attention to grow and thrive.  Lack of nutrients or sunlight, too much or too little water and a host of fungal infections or nasty insects can lead to your prized roses withering away or a large patch or your grass going brown and dying.

If some of the plants in your garden have suddenly withered away then you should first have a think about what’s changed since the time when they grew successfully.  Has it rained a lot recently?  Have you or your neighbour been a bit trigger happy with the Roundup weedkiller?  Has a dog been using your grass as a toilet?  These are all common easily explainable reasons for plants suddenly struggling.  However, if a big patch of grass close to your kerosene tank randomly goes brown and dies it’s probably worth investigating the possibility of a spill.  If this is the case you’ll probably also be able to smell the kerosene or see an oily sheen and it’s important to contact a proffesional to respond to this as quickly as possible.

But what if there’s a corner of your garden where things just don’t grow?  Well if it’s free draining, gets a decent amount of sunlight, you’ve tried different specices of plant and you’ve tried adding fertilisers and nothing has helped?  It might be time to have a look at other possibilities.  It’s possible that there is some sort of Phytotoxic (poisonous to plants) contamination in the soil.  Modern housing developments will have been the subject of site investigations to look into these things and if there was an issue of this kind then remedial works should have been carried out to remove these risks as part of the development.  It should be said that although the planning system is in place to make sure that this process is followed and in our experience generally works well, sometimes things aren’t always done to full standards and some properties can slip through the cracks.  It might seem obvious but older properties were not built to modern legislation so it’s hard to be sure what’s in the soil around these properties.

A suitably experienced professional will be able to have a look at the situation, suggest a few possible culprits and maybe recommend a suite of analysis.  Problems of this kind can be a bit like looking for a needle in a haystack so this analysis might not identify the problem but it can certainly rule out a range of things and point you in the right direction to get things growing again.

Our fingers may not be the greenest but we do know about contaminated land so if this sounds like your garden then some remediation may be required, feel free to call us for a chat.

Everything you wanted to know about soil remediation but were too afraid to ask

This free guide will help you understand the whats, the whys and the hows of soil remediation in the simplest terms. Download it now for free!

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Installing an anti dig membrane

Installing an anti dig membrane

In the past houses were often built on contaminated land that was neither cleaned up properly or indeed at all.

So it is no wonder that home owners are devastated to learn that their homes could be worthless and they are at risk when in the garden and eating their home grown veggies.

But all is not lost.  The first thing to do is to determine if the contamination causes a problem and if so to whom or where, see our blog for more info .  If the contaminant is an organic, such as oil, diesel, etc. then there are several tried and tested low impact methods to remove it from the soil, but if it’s an inorganic, such as lead, zinc, copper, etc then an engineered solution will be required.

For around homes this normally entails excavating and removing a 600mm (two spades depth) layer of the contaminated soil throughout the affected area but not under the house.

Once this is completed then an anti-dig barrier, such as the yellow one in the picture, is installed along with a geo-membrane.  This prevents the movement of particulates whilst allowing rain water to migrate down to the water table.  Then clean sub and top soils can be imported to replace those removed and the task of re-landscaping can begin.

Whilst this approach can initially appear quite intrusive it is relatively straight forward and can be undertaken quite quickly with little fuss.  A plant rescue can easily be undertaken for all those treasured specimens along with dismantling and reusing sheds, greenhouses, paths, etc.  One concern to residents is when a beloved pet has been buried in their garden.  Often in these situations that small amount of soil can be allowed to stay…!

Why not have a look at our case study where we undertook the above works or give us a ring for a confidential discussion.

Everything you wanted to know about soil remediation but were too afraid to ask

This free guide will help you understand the whats, the whys and the hows of soil remediation in the simplest terms. Download it now for free!

Download!

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Contaminated Land and the ‘Growth and Infrastructure Act 2013′

May 6, 2013

Will the recent Growth and Infrastructure Act 2013 make a positive difference to the UK? Will the Act make a difference to how Contaminated Land is handled? Question 1 has many answers with the polarised ones as usual the most interesting. The Local Government Association web-site says that barriers to growth aren’t Planning, apparently Planning [...]

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How do you Accurately Assess a Spill ?

May 2, 2013

We said we would keep you updated on the development of the oil spill in Mayflower Arkansas so one month on here we are and it seems like I might have spoken a bit too soon about the quality of the emergency response.  Recent reports have indicated that there may be chemicals such as Methylene Chloride, Barium and [...]

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Can my soils be cleaned?

May 1, 2013

We get this question from 3 types of clients, the ones who don’t know if we can help them, the ones who think we can remove any contaminant from any material, and the people in the middle who have used remediation contractors in the past and have a good idea of what we can do. This [...]

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Young Japanese Knotweed: An Infested area

April 29, 2013

I’m following on from my post about ‘Young Giant Hogweed: The start of an Infestation’ which shows Giant Hogweed starting to infest an area.  These photos below show young Japanese Knotweed, growing in an area which has already been infested, and new growth is emerging following the winter die back. It took me a while [...]

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When to spray Japanese Knotweed…?

April 23, 2013

So the suns beginning to appear but be warned so will your Japanese Knotweed problem…unless you act soon…! This invasive species likes to grow fast which is good and bad.  Bad for buildings and the environment but good for us as it aids easy identification which allows for effective eradication through spraying. But don’t go crazy with the spray [...]

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How to deal with a BIG Oil Spill?

April 8, 2013
http://www.youtube.com/watch?v=pHJBRRqy9nU”>videos

The images and videos of the spill from a ruptured oil pipeline in Mayflower Arkansas are truly stunning and more than a wee bit scary.  The scenes of crude oil pouring around the houses, over the gardens, pavements and along the road guttering of a tidy suburban community are somehow more shocking than images of an [...]

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Groundwater Treatment: Removing fuel and fuel oils

March 28, 2013

Hydrocarbons (better known as fuel or fuel oils to most people) can be relatively simple to remove from groundwater.  A challenge often faced when remediating petrol filling stations. A silver lining for fuel oil remediation in the ground is that fuel floats on water which can mean that the majority of contamination is confined above the water table.   Be aware [...]

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What rate of landfill tax applies to contaminated soils…?

March 27, 2013

We recently asked the HMRC when we should apply the standard rate of landfill tax (LFT), soon to be £72 per tonne from April ’13, when disposing of contaminated soils and when the lower rate of £2.50 per tonne should be levied.  The reason being that when remediating sites we’re often asked to provide rates [...]

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