Safe Patio cleaner

MouldyOldDough

I am looking for a patio cleaning fluid that won't kill grass if it comes into contact with it..

Does this exist? 

Robin9

Try White Vinegar and BiCarb

Grenage

Anything particularly acidic (probably all cleaners) will displease grass.   Your best bet is thoroughly watering the area to dilute any overspill

grumpy_codger

Robin9 said:

Try White Vinegar and BiCarb

Urban myth. Each can work  on their own, but when mixed together they produce CO2 and nothing useful.
Possibly (I don't know), you can clean patio with bicarb and then neutralise it with vinegar to protect the grass. Or vice versa.

grumpy_codger

MouldyOldDough said:

I am looking for a patio cleaning fluid that won't kill grass if it comes into contact with it..

Does this exist? 

 Yes. H2O (and a pressure washer).

twopenny

Now I've got a duff leg and back I use Wet & Forget.

I have wrapped plants nearby in plastic food bags but so far it hasn't damaged my box hedge or the grass.

The slabs stay like new for at least a year.

I'm fairly careful at the edges but got to the stage that if it does it does. So far it's fine.

I've use an organic product but nowhere near as good. Fairly pointless in fact.

I've tried pressure washing but again, it's back the same with dirt in the rain.

teaselMay

It's possible survival of the fittest means I have quite resilient grass (trampled, zoomied, peed on and dug by hounds on a daily basis) but even bleach straight from the bottle accidentally reaching it doesn't appear to bother it

CliveOfIndia

I'd agree with the pressure washer approach, that's probably simplest and totally chemical-free.

If you don't have a pressure washer and don't want to buy one, I'm wondering whether the old trick of some biological washing powder mixed in warm water may work?  If it's mainly algae you're trying to get rid of then this may do the trick - I don't know for certain, it's just a thought.

But overall I'd say a pressure washer is your best bet.