Sea-thorn
Inheriting the best traits from each parent plant, Sea-thorn is a balanced and adaptable fusion that performs reliably across varied zombie lineups and difficulty levels.
Combat Stats
Sun Cost
200 Sun
Damage
20 (small)<br>20x4 (normal)
Attack Speed
1.5s
Range
In front
Target
Water, Air
Toughness
300
Details
will attack zombies in front by shooting long-ranged spores. If a flying zombie is detected in front, will attack them by shooting both long-ranged spores (even when there are no zombies on water) and airborne cactus thorns.
Both long-ranged spore and cactus thorn projectiles deal 20 damage. Long-ranged spores can only hit zombies on water, and cactus thorns can only hit flying zombies.
Due to its small size, cannot be damaged by straight-shooting projectiles such as those fired from or .
Pros
- Consistent lane coverage — 20 (small)
20x4 (normal) every fires every 1.5s keeps steady pressure on the zombie approach path. - Broad applicability — No specialized condition needed; works in virtually every level type.
- Fusion value — Parent-plant combination creates a stronger attack profile than either plant alone.
Cons
- Generalist ceiling — Lacks the peak power spike of specialist fusions in their ideal conditions.
- Protective dependency — 300 requires wall support to reliably fire for multiple full waves.
- Outpaced in endgame — Specialist fusions eventually outperform Sea-thorn in the scenarios they were designed for.
1
Assign Sea-thorn to your primary zombie lane each level for maximum attack-cycle utilization throughout the run.
2
A single wall plant in front keeps Sea-thorn safely firing from a protected position across multiple wave cycles.
3
Check the active Lumos level bonuses — if any match Sea-thorn's attack type, the multiplier can dramatically increase its effective DPS.
4
Refresh your knowledge of Sea-thorn's recipe before long sessions — replanting mid-wave requires knowing the parent plants instantly.
What is Sea-thorn in Plants vs Zombies Fusion?
Sea-thorn is a Common fusion plant created by combining two base plants in Plants vs Zombies Fusion. Common fusions like $name are accessible across most game modes and remain competitive throughout the game.
What does Sea-thorn cost?
Sea-thorn requires 200 Sun to plant. Building a strong sun economy early in a level — through sun-producing fusions or quick early waves — ensures you can place Sea-thorn when needed without resource pressure.
Which zombies does Sea-thorn target?
Sea-thorn focuses its attacks on Water, Air zombies. Use this knowledge to pre-assign it to whichever lane or row contains the highest concentration of those zombie types in each level.
How tough is Sea-thorn compared to other fusions?
Sea-thorn has 300 toughness, which places it in the mid-range of the fusion toughness scale. Pair it with a healing plant or defensive buffer to extend its operational lifespan across multiple consecutive waves.
