Durin

Durin is a type of Berry that can be planted in the Farm. It can be obtained by surrounding a Rabuta berry with at least 130, but no more than 160 points of bitter and no more than 80 points of all other flavours. The Rabuta berry will then have a chance to mutate into this berry.

Possible Planting Formations
You can fill your farm in the following way to obtain Durin berries. Purple squares indicate where mutations can occur.