This is a ground cover located in the Ground/Paths Tab in the FT Store.
It is the same as the green default grass but with red lines on top. 
 
The First Time purchase price is 35 FC, 
after that it is only 100 coins to purchase on other farms you may wish to design on.
This will show in the store once you have spent the initial 35FC.
As a beginning designer I was curious to know how many spaces were on every sized farm.
That way I could re-size my cross stitch template or graph paper to suit my farm size.
I then print out my template and hand draw my design on to it. 
 Height was easy as I followed the height chart from my website. hmmm but what colours to use? 
I can then start to design! 
I hope the information I have worked out below can assist you with designing your first flower farm
(as you can see if I had a 12 X 12 farm I can plant 2,304 flowers on it) 
(although farm sizes do not go up to 40 x 40 as yet, you just never know what S/K will introduce)

I would like to thank Sajad Qureshi for his help in calculating this website page. 
FARM SIZE ROWS ON A FARM FARM GRID SPACES
12 X 12 48 X 48 2,304
14 X 14 56 X 56 3,136
16 X 16 64 X 64 4,096
18 X 18 72 X 72 5,184
20 X 20 80 X 80 6,400
22 X 22 88 X 88 7,744
24 X 24 96 X 96 9,216
26 X 26 104 X 104 10,816
28 X 28 112 X 112 12,544
30 X 30 120 X 120 14,400
32 X 32 128 X 128 16,384
34 X 34 136 X 136 18,496
36 X 36 144 X 144 20,736
38 X 38 152 X 152 23,104
40 X 40 160 X 160 25,600
A little quirk of mine is to try and use facility flowers only.
Can you imagine the amount of facility used flowers you can have in storage if you "fertilised" and "Irrigated" then harvested them as soon as they were ready. Maybe I am addicted!
(click here)  to download a "Printable Graph Paper" in a variety of sizes