While mowing it's easier to protect the plants this way. It's placed around the trees I planted too. 

Some of my bushes are attacked by black sticky stuff too. I chopped or removed them. I think it has to do with the spot they are since they don't have it all. A few grow back so I'll keep an eye on them and the curry plant. 

If I throw the seeds on the ground nothing will happen except weeds growing fast (yesterday I did a part in the back yard it was 1 meter high after the rain) and if I use the trimmer the new plants will be gone too. 

For here I need to seed in pots on tables to make a chance or I need to plant plants.