Pet friendly weedkiller

Grandad 99

The paving slabs in the patio were laid with almost one inch wide gaps between. The cement infill was recessed below the level of the slabs. Over the years has become covered by various types of organic detritus which has been colonised by weeds.  Long term solution is to rake out and replace the cement but until I can get round to it I would like to kill the weeds.  Having a dog what is a suitable weedkiller?  

wild edges

A flame gun or blow torch might be your best bet. Or embrace the weedy look and plant to enhance it.

Pete.8

I sometimes use glyphosphate (e.g. Roundup) to kill perennial weeds in my garden and I also have a grass-munching dog.
Once glyphosphate is dry it is harmless to animals, and it only takes 20mins to dry. But weeds must be actively growing for it to work, so use between April and Sept.
Or as WE suggests above, a flame gun, but they don't usually kill the roots so needs to be repeated every now and then.

glasgowdan

I wouldn't use flame guns as they burn fossil fuel, quite a poor environmental choice, especially factoring in the need for repeat treatments.

Glyphosate, the basic weedkiller, is what you want. Keep pets away for an hour then get on with life as usual

Smudgerii

glasgowdan said:

I wouldn't use flame guns as they burn fossil fuel, quite a poor environmental choice, especially factoring in the need for repeat treatments.

Glyphosate, the basic weedkiller, is what you want. Keep pets away for an hour then get on with life as usual

Weighed against the impact manufacturing Glyphosate how does the flame gun stack up?

Or we could go much deeper, what is the overall environmental impact of the manufacture, shipment, use (including other required equipment), waste disposal, residuals etc.

Although Glyphosate is the better choice for the job, the argument is possibly a poor choice.

madpenguin

Smudgerii said:

glasgowdan said:

I wouldn't use flame guns as they burn fossil fuel, quite a poor environmental choice, especially factoring in the need for repeat treatments.

Glyphosate, the basic weedkiller, is what you want. Keep pets away for an hour then get on with life as usual

Weighed against the impact manufacturing Glyphosate how does the flame gun stack up?

Or we could go much deeper, what is the overall environmental impact of the manufacture, shipment, use (including other required equipment), waste disposal, residuals etc.

Although Glyphosate is the better choice for the job, the argument is possibly a poor choice.

I suppose the only way to be truly environmentally friendly is to weed by hand though this is not always practical 

glasgowdan

Smudgerii said:

glasgowdan said:

I wouldn't use flame guns as they burn fossil fuel, quite a poor environmental choice, especially factoring in the need for repeat treatments.

Glyphosate, the basic weedkiller, is what you want. Keep pets away for an hour then get on with life as usual

Weighed against the impact manufacturing Glyphosate how does the flame gun stack up?

Or we could go much deeper, what is the overall environmental impact of the manufacture, shipment, use (including other required equipment), waste disposal, residuals etc.

Although Glyphosate is the better choice for the job, the argument is possibly a poor choice.

I'm well-versed in Environmental Impact Assessments and Life Cycle Analyses... this is my balanced view on things! Given the longer lasting result from weedkiller, the manufacture, transport and disposal of propane cannisters, short-lived results and fuel use, not to mention the labour requirement. 

Grandad 99

 But weeds must be actively growing for it to work, so use between April and Sept.

The weeds have been very active over the past 3 months so I'm thinking of applying the glyphosphate now. Being winter will it still be OK for the dog within an hour? If not, how long?

glasgowdan

It won't be very effective now.... But no harm in doing one now and another in April. 

Yep, once dry... 

Topbird

Personally, I wouldn’t apply glyphosate now for 2 main reasons:

1] it is much more effective when weeds are growing strongly (April to Oct).

2) Glyphosate should not be used if rain is forecast within the next 8 hrs or (I assume) if a heavy dew is likely. Both these things are likely to happen at this time of year.

As one who tries to use as few chemicals as possible in the garden I only use them under optimal conditions. That way I can use the minimum amount and usually only need one application.

Pete.8

I doubt glyphosphate will work this time of year.
The weeds must be growing actively for it to work - plants are not growing fast enough now.