My mum has a diabetic ulcer on her leg should we try hemp seeds to help heal it?

Diabetic foot. There are many avenues to seek help: your primary care physician can evaluate you and refer you on; a wound care specialist in a wound center; or a podiatrist that has an interest in wounds are your best choices. But do not hesitate! seek help as soon as possible as foot ulcers in diabetics can get serious very quickly. Hemp seeds will only delay a healing process.
NO! Get a referral to a wound doctor immediately to decrease the risk of losing a leg. Don't fool around with stuff you read about on the internet or hear about from friends. She need real medical attention for a very significant problem.