The blackberry can either be a seed, a bush, or a fruit found in viva pinata.
You obtain it by talking to Seedos for the seed (you must be Gardener Level or higher) and getting lucky, or purchasing the seed at Costolot's store (Gardener Level 9 or higher). The fruit is also available at Costolot's store (at Gardener Level 9 or higher).
|Base Value (seed)||55 coins|
|Base value (fruit)||100 coins|
|Base Value (tree)||140 coins|
|Selling Price (seed)||50 coins (Costolot's)|
|Selling Price (fruit)||20 coins (Costolot's)|
|Surface Requirements||Plant in grass, soil, or long grass|