CoralStay

Coral Stay
For 1.13.1+

Coral stay is a simple plugin that allows you to place coral out of water without it dying. You can configure what worlds are affected and even what blocks are.

Config:

# The list of corals affected by this plugin: (Caps not needed)
stay_alive_coral:
    - TUBE_CORAL_BLOCK
    - BRAIN_CORAL_BLOCK
    - BUBBLE_CORAL_BLOCK
    - FIRE_CORAL_BLOCK
    - HORN_CORAL_BLOCK
    - TUBE_CORAL
    - BRAIN_CORAL
    - BUBBLE_CORAL
    - FIRE_CORAL
    - HORN_CORAL
    - TUBE_CORAL_FAN
    - BRAIN_CORAL_FAN
    - BUBBLE_CORAL_FAN
    - FIRE_CORAL_FAN
    - HORN_CORAL_FAN
    - TUBE_CORAL_WALL_FAN
    - BRAIN_CORAL_WALL_FAN
    - BUBBLE_CORAL_WALL_FAN
    - FIRE_CORAL_WALL_FAN
    - HORN_CORAL_WALL_FAN

#In survival mode you put the coral in the furnance and out pops the dead coral.
Survival_Furnace_Recipe: true
#The amount of dead coral you want it to give the player.
Dead_Coral_Amount: 1
#How long it takes to cook the coral.
Cook_Time: 10

# If you want only certain players to place coral.
Restricted_Access:
    Enabled: false
    Permission: 'coralstay.placecoral'
    # If players should be not be allowed to place coral. False means it is disabled.
    BlockPlacement:
        Enabled: false
        Deny_Message: '&cYou do not have permission to place coral!'
 

#If this is only allowed on certain worlds.
World_Whitelist_Enabled: false
#The worlds this is allowed on.
World_Whitelist:
    - world

Commands:
- /coralinspect - Look at the data for a coral block. Permission: coralstay.coralinspect.

If the plugin does not work then the problem likely is that you are not using the latest spigot version or not using Java 8.