I would have thought that you take the stated weight of the packet you have and work out how many 35gs are contained therein. Or read how many sq metres your package covers and estimate from there. You would be close enough for government wok ,as the saying goes.

a letter with 3 sheets of A4 is about 20grm

A standard plastic teaspoon is 5ml. Of course it depends on differing density but itls not going to be that critical unless you start marking your lawn out in metres squares.

Just work out the roug area of lawn, total feed required. What proportion of the pack that is and eyeball it.

pgk

Whatever you do, don't spread it in such a cavalier fashion that the top comes off the container and you splatter the entire contents over a very small area. If you do this, the grass dies and it takes a lot of effort to regrow it. Don't ask me how I know this….

Maybe you should start from the area of grass you want to treat. For example a 14kg bag of weed and feed I just looked at will cover 400 sq metres. If for example you have 250 sq meters you need a little over half a bag. I use the stuff fairly frequently as I have a lot of moss to deal with and it's fairly forgiving so long as you spread fairly evenly.

regards Martin

It's worth considering if you can do this by weighing in one go, the total of Evergreen for the lawn area. This will depend to some extent on how it's applied – as dry granules or a solution in water.

35g is barely an ounce and a quarter, so weighing it accurately is easier if in a larger amount.

You could also find some suitable container you can level-mark indelibly with the correct amount of that chemical, once established, for repeat use.

If you use a lot of garden additives by weight or volume, see if you can buy a low-cost scales and measuring-jug in your local shops that can open. Keep them in the shed or green-house!

I use Evergreen and generally take an aerosol cap, fill it about half way and sprinkle that over a 1msq area. Use a larger bowl to pour the stuff into first. It's easier to scoop into as you go.

Ed. I need to get some, the weeds are sprouting fast this year!

I was going to say that if you used 1 teaspoon = 5g you wouldn't be far out, and the exact amount is far from critical, within broad limits plants will take what they want.

Biggest hazard is a lawn that grows into a jungle… personally I think only masochists fertilise their lawns!

Neil

I seem to recall that vinegar and bicarb of soda kills weeds (and grass) well – at least my dad reckoned it did after I was caught doing a spot of rocket launching from the back lawn.

Why complicate it? Paul Rhodes above has the best idea. just calculate what proportion of the bag is need for your lawn and spread that. (It ain't critical – you can eyeball that much).

Ask the local drug dealer to do it for you. He will probably bag it up in nice little bags for you if you ask him nicely. You could let him have some to bulk up his ganga as payment. Just do not let the local plod catch you driving home with the bags