If you want to add Timothy to your garden, it's generally grown from seed. Walmart sells Everwilde Farms jumbo packets containing 1,000 wild Timothy grass seeds for under $4.

How Finnish farmers have doubled yields Farmers in Finland have doubled yields from grass leys made up of mostly timothy by adopting a range of strategies, including using more diverse seed mixes ...

According to Timothy, grass starts growing quicker when temperatures reach 10C and above. So, if your local day and night temperatures are falling below this, it's time to store away the mower.