Weeding puzzle

I have reached the phase where now I have to make the flowers blue. But to be honest I have gotten here by pure luck and no skill. I still do not understand the puzzle. When I think I do, that is when I hit the wrong cell. If anyone can help it would be greatly appreciated. Explaining the hints in terms of a visual would be great. Thanks in advance

Hey,

there is a really good guide in the forum that helps me a lot; so give it a try :

http://www.totemtribe.com/talk/how-to-weed-your-garden/

This is a really good guide that I like to use for this puzzle, and it includes lots of details and examples

I have some questions about this minigame, because when you have 8x8 puzzle, you need to make too much guesses to solve it.

1. Except square and rectangular flower blocks, it is possible to have L-shaped flower blocks. Is it possible then that the flower blocks can be T-shaped, [- or ]- shaped, E-shaped or any other shape, provided that every flower cell touches at least another by their sides?

2. Over how many cells you can use The Flower Herbicide?

3. Is The Flower Herbicide disposable or you can use it again?

Herbicide is for 1 cell and disappears.  You can have a maximum of 5.  The florist will exchange 10 dead flowers, for a herbicide.  Talk to her after you fail.  Flowers turn blue, when you get to 10x10 grid.  At 20x20 grid, you get roses.

Best clue is paths must always connect.  You can see some of the shapes below.