Whispike Survivors - Sword of the Necromancer

To get this you just need to have 12 seeds planted in all your farm plots. To make it really easy you can just begin a game and get a couple abilities then die. Restart again and get a few more abilities and die again. Each time you die you will get a seed to plant. Do this until you have the 12 seeds needed to plant and then just plant all 12 and the achievement is yours!