Here is a list of farms where you can pick your own blueberries in Niagara.

Please call the farms for picking conditions before you go. 

Pick Your Own Blueberries in Niagara:

Bluemin Acres Farm 
Pick your own blueberries available as well as a market with jams and fresh fruit.
Address: 1007 Line 1 Niagara-on-the-Lake
Telephone:(905) 468-8162

Blueberry Knoll Berry Farm
Blueberry Knoll Berry Farm grows strawberries, raspberries and blueberries. Pick-your-own blueberries are available in-season. Their farm-market & bakery is open year-round, with variable winter hours.
Pick-your-own blueberries are available now. Check here for updates.

From their website:

Our 2020 Harvest season will have new procedures in place for the safest experience possible. Please follow all signage at the Farm and do not come if you are feeling unwell. Our Farm Market offers a walk-up service (no entry to the building). Portable washrooms are available. NO PETS PLEASE.  For PYO this year, prepayment in the field is required, Debit or Credit only, tap preferred.  Handwashing in the field is a requirement. 

PYO blueberries: 2 pail sizes - 3 litre for $15 and 5 litre for $25

Hours: Monday – Saturday 9am-5pm, Sunday closed.
Address: 1091 Hutchinson Rd, Lowbanks
Phone: 905-774-7732