What is the rarest weather event in Build A Ring Farm?

Bee Swarm is the rarest standard event at roughly 0.5% per weather cycle, and it applies Honeycomb (6.5x), the strongest free event mutation. Galaxy is the rarest common-rotation event at about 4%, applying Rainbow (5x).

Do weather events fire while I'm offline?

No. Plants keep growing and harvest boxes accumulate while you're offline, but weather events stop rolling. No new mutations are applied until you log back in, so big mutation farming has to be done while you're active.

How do I get more mutated plants per event?

Mutation rolls are per plant and independent. The more plots you have planted when an event fires, the more chances you get. Expand your farm and keep every plot full so a single Galaxy or Nuclear event mutates as many crops as possible.

Can I force a specific weather event to appear?

No. Weather events are rolled randomly each cycle and you cannot influence which one fires. The only way to guarantee a specific mutation is to buy the corresponding Spray from the shop (e.g. Rainbow Spray for the Rainbow mutation). Events are purely luck-based, so keep your farm full and stay online to catch as many cycles as possible.

Does the Mega Farm event stack with weather mutations?

Yes. Mega Farm doubles your harvest boxes but does not interact with the mutation multiplier — they are separate layers. If a plant already has a Rainbow (5×) mutation and Mega Farm fires, you collect two harvest boxes each worth the full mutated price. This makes Mega Farm especially powerful on already-mutated crops.

天气事件

免费突变靠天气，关键是提前准备。

不买喷雾的话，天气事件就是 Roll 突变的唯一来源。每轮先看事件是否触发，触发后每株植物再独立 Roll 对应突变。

两次 Roll 决定一切

突变要同时满足两件事：天气事件先触发，然后单株植物再 Roll 中。

EffectiveRate = eventChance × chancePerRoll

P(any plant mutates) = 1 − (1 − chancePerRoll)^plants

Galaxy 大约 4% 天气循环触发，事件内每株 1% 概率出 Rainbow，所以单株综合概率约 0.04%。满地块能明显提高“至少中一株”的概率。

全部天气事件

按常见程度排序。越稀有的事件，给的倍率通常越高。

Rain

触发 wet

1.35×

收获倍率

最常见的天气事件，约 40% 概率触发。每株有 8% 概率获得 Wet（1.5x）。

事件触发率: 40%
单株 Roll: 8%
综合概率（单株 / 单轮）: 3.20%

Blizzard

触发 frozen

1.75×

收获倍率

暴雪事件，每株有 4% 概率获得 Frozen 突变。

事件触发率: 20%
单株 Roll: 4%
综合概率（单株 / 单轮）: 0.80%

Autumn

触发 autumn

2×

收获倍率

Harvest season event that applies Autumn mutation (2x) at 3.5% per plant.

事件触发率: 15%
单株 Roll: 3.5%
综合概率（单株 / 单轮）: 0.53%

Black Hole

触发 void

2.25×

收获倍率

黑洞异常事件，每株有 3% 概率获得 Void 突变。

事件触发率: 12%
单株 Roll: 3%
综合概率（单株 / 单轮）: 0.36%

Nuclear

触发 radioactive

3×

收获倍率

通过 Radioactive 突变让作物价值变为 3 倍，适合围绕它安排大收获。

事件触发率: 7%
单株 Roll: 2%
综合概率（单株 / 单轮）: 0.14%

Galaxy

触发 rainbow

5×

收获倍率

稀有常规事件。每株 1% 概率获得 Rainbow（5x），是免费突变里的核心目标。

事件触发率: 4%
单株 Roll: 1%
综合概率（单株 / 单轮）: 0.04%

Alien Invasion

触发 alien

3.25×

收获倍率

Alien Invasion 事件，UFO 扫描农场，每株 2.5% 概率获得 Alien（3.25x），仅事件可得。

事件触发率: 2.5%
单株 Roll: 2.5%
综合概率（单株 / 单轮）: 0.06%

Trucker

触发 farm

4×

收获倍率

Trucker 事件会触发 Farm（4x），仅事件可得。

事件触发率: 1.5%
单株 Roll: 1.5%
综合概率（单株 / 单轮）: 0.02%

Queen Bee

触发 honeycomb

6.5×

收获倍率

互动特殊事件。收集 5 蜂巢 → 1 蜂蜜代币。在蜜罐消费可获 Honeycomb 突变（0.5%）、Honeysuckle 种子（37%）或 Queen Blossom 种子（0.1%）。持续约 5 分钟。

事件触发率: 0%
单株 Roll: 0.5%
综合概率（单株 / 单轮）: 0.0000%

Plant Rush

触发

0×

收获倍率

Update 3 新增互动事件。与其他玩家合作击败巨型植物获取 Plant Tokens，在事件商店兑换喷雾、种子或 Boss Box（Garden Golem 0.5%、Cosmic Spray 5%）。约每小时触发。

事件触发率: 0%
单株 Roll: 0%
综合概率（单株 / 单轮）: 0.0000%

满农场时大概是什么样

假设事件触发时地里有 50 株。地块越多，独立 Roll 次数越多。

事件	倍率	至少 1 株突变概率	期望突变数
Rain	1.35×	98.5%	4.00 plants
Blizzard	1.75×	87.0%	2.00 plants
Autumn	2×	83.2%	1.75 plants
Black Hole	2.25×	78.2%	1.50 plants
Nuclear	3×	63.6%	1.00 plants
Galaxy	5×	39.5%	0.50 plants
Alien Invasion	3.25×	71.8%	1.25 plants
Trucker	4×	53.0%	0.75 plants
Queen Bee	6.5×	22.2%	0.25 plants
Plant Rush	0×	0.0%	0.00 plants

期望突变数 = 植物数 × 单株概率。至少 1 株突变概率 = 1 − (1 − 概率)^植物数。

计算突变后值多少钱

免费突变靠天气，关键是提前准备。

两次 Roll 决定一切

全部天气事件

Rain

Blizzard

Autumn

Black Hole

Nuclear

Galaxy

Alien Invasion

Trucker

Queen Bee

Plant Rush

满农场时大概是什么样

相关攻略

蜂后活动

蜜蜂攻略

植物狂潮

全部突变

收益计算器

装备商店价格

圆环放置攻略

种子图鉴

新手指南