line/paragraph spacing

[hargi]

Hi using CSS with li
got sentences that go on to 2 lines is there a way of getting the spacing between the li slightly bigger than the spacing between the lines of the same sentence?

 

[hargi]

I know my post didnt make much sence so i ll use a pic

the Maintenance of herbaceous perennials is all in the same li tag but goes on 2 lines
where as the Maintenance of plants in pots is in another li tag but goes on one line.
is there anyway of making the space inbetween the li tags bigger but keeping the other the same

 

[hargi]

thanks, your a star