diff --git a/server/sim/content/kits/tier1.js b/server/sim/content/kits/tier1.js
index a61fb734..acfb21ef 100644
--- a/server/sim/content/kits/tier1.js
+++ b/server/sim/content/kits/tier1.js
@@ -241,8 +241,8 @@ export function batMod(v, chess = null, desc = '') {
 // =================================================================================================================
 // tier-local constants that exist nowhere in data
 
-/** Radius (tiles) of 波登可's spore cloud "在周围产生…孢子群" (no blackboard key; ≈ the 3×3 around the vial). */
-const SPORE_RADIUS = 1.2;
+/** Radius (tiles) of 波登可's spore cloud. No blackboard key; PRTS 波登可 备注 "孢子群范围半径为0.9，可对空". */
+const SPORE_RADIUS = 0.9;
 /** "周围8格" = Chebyshev ring 1 ⇒ Euclidean radius covering the 8 neighbours. */
 export const RING1 = 1.5;
 /** 普罗旺斯 杀戮嗅觉 "普通攻击不再以生命值高于80%的敌人作为目标" — the 80 % exists only in the skill text. */
@@ -750,8 +750,8 @@ export default {
   },
 
   // ---------------------------------------------------------------------------------------------------------------
-  // 1_13 波登可 孢子扩散: a vial bursts on the current target into a projectile_delay_time s spore cloud: enemies inside
-  // are 停顿 and lose their abilities (silence) and take atk_scale × ATK arts per second.
+  // 1_13 波登可 孢子扩散: a vial bursts on the current target into a projectile_delay_time s spore cloud (radius 0.9,
+  // PRTS 备注, 可对空): enemies inside are 停顿 and lose their abilities (silence) and take atk_scale × ATK arts per second.
   // 园丁: every 【辅助】 operator on the field ATK +atk. Elite module (DEC-X): +sp_recovery_per_sec SP/s with an enemy in range.
   // Alternate S1 花香疗法: ATK +atk, normal attacks heal the most injured ally in range instead (ATK per attack). A heal
   // skill: DEFAULT fires it with an injured ally inside her initial range (research 03 §1.4) — also checked every tick,
diff --git a/test/content/kits_t1t2.test.js b/test/content/kits_t1t2.test.js
index 98fb94dc..d1b3bb8f 100644
--- a/test/content/kits_t1t2.test.js
+++ b/test/content/kits_t1t2.test.js
@@ -427,13 +427,21 @@ test('1_13 波登可: 孢子扩散 cloud — projectile_delay_time pulses of atk
   approx(u.s.atk, u.base.atk * (1 + t.atk), 'self is SUPPORT');
   approx(goat.s.atk, goat.base.atk * (1 + t.atk), 'other SUPPORT');
   const [a, b, far] = h.enemies();
-  for (const e of [a, b]) {
+  // PRTS 备注 "孢子群范围半径为0.9": the vial lands on one enemy; the next tile (centre distance 1) is outside 0.9 and inside the old 1.2
+  const zone = h.eventsOf('fx').find((e) => e[1] === 'zone' && e[4]?.skill === 'spores');
+  assert.equal(zone[4].radius, 0.9);
+  let inside = 0;
+  for (const e of [a, b, far]) {
+    const d = Math.hypot(e.x - zone[2], e.y - zone[3]);
     const z = dealt(h, u, (c) => c.target === e && (c.dmg.tags || []).includes('zone'));
-    assert.equal(z.length, bb.projectile_delay_time, 'one pulse per second');
-    for (const c of z) approx(c.amount, u.s.atk * bb.atk_scale);
-    assert.ok(statuses(h, 'silence', (c) => c.target === e).length > 0 && statuses(h, 'sluggish', (c) => c.target === e).length > 0);
+    if (d <= 0.9) {
+      inside++;
+      assert.equal(z.length, bb.projectile_delay_time, 'one pulse per second');
+      for (const c of z) approx(c.amount, u.s.atk * bb.atk_scale);
+      assert.ok(statuses(h, 'silence', (c) => c.target === e).length > 0 && statuses(h, 'sluggish', (c) => c.target === e).length > 0);
+    } else assert.equal(z.length, 0, `outside 0.9 (d=${d})`);
   }
-  assert.equal(dealt(h, u, (c) => c.target === far && (c.dmg.tags || []).includes('zone')).length, 0);
+  assert.equal(inside, 1, 'only the enemy the vial landed on');
   done(h);
 
   // elite module: +sp_recovery_per_sec SP/s while an enemy is in range