I can;t recall the mix off the top of my head... but when i;m home later i'll check my bottle, I know it has directions on it.... its not alot though, I think mine is 5mL per 1L

Mixing it is a pain... i know I can also tell you from the directions on my bottle it recomends mixing it like this:

1. mix your neem oil with 1 cup of warm/hot water

2. shake vigorously

3. add the remaining water

4. shake vigorously

it also recomends on the bottle that you can microwave the neem oil before mixing it to help it mix.

I know it doesn;t say it the directions for mine, but I also add a couple drops of plain old liquid dish soap (not he bacteria fighting kind... just plain dish soap).

The dish soap helps by emulsifying the oil. The dish soap shouldn't harm the plants as long as you don't overdue it... you don;t need much! I think my mix is normally about 2-3ml neem oil + 0.5L water + 1ml dish soap (sorry if you are use to imperial units, but I don;t know what the imperial equivalent of a ml is! but 1L is almost identical to 1 quart, i know that).

tip: if you are going to add the dish soap in, don't fill your spray bottle right to the top, the soap is going to cause soap bubbles to form inside the bottle when you try to shake it, and it will become difficult to shake if the bubbles fill all the empty space of the bottle.

also, when you spray, make sure you get the under side of the leaves as well, as thats where the pests tend to like to live.