The Kumiromi's gem stone of rejuvenation is the second reward from worshiping Kumiromi of Harvest. When used on a dead plant or newly planted seed, the plant grows into a bud. When used on a bud, the plant will become ready to harvest. When used on a plant ready to harvest or on a tile that contains no plant, it does nothing. It may only be used once every 72 hours.
With this item you won't need to depend on leveling Gardening to grow successful crops from seeds.
In Vanilla Elona player would need to duplicate this item through Little sister quest.
In Elona+ Organic fertilizer is a lesser version of the gem stone that can't revive dead plants.
The Kumiromi's gem stone of rejuvenation has sprite number 657, with green tint.