白毛球

白毛球的基本資料

栽培難度

適合新手

壽命

多年生植物（壽命資料稀少）

體型

莖高5～8（～12）cm，直徑3～6（～8）cm。群生成大型穹頂狀

澆水

生長期施用氮含量少、磷酸與鉀含量多的肥料，用量少

日照與放置位置

戶外放在向陽處、明亮散射光或午後遮陰的地點，室內則放在明亮且能接受一些直射日光的位置。強光下株體呈青銅色，花的著花數、毛髮與刺的發育狀況會更好，但長時間直射日光會造成曬傷。

澆水

仙人掌按多肉植物的夏型種方式栽培。夏季定期澆水，但對過度潮濕非常敏感，不要澆水過多。若水分過多且光線不足，株體會膨脹而變形。冬季需保持良好通風並使其乾燥。

溫度與越冬

保持乾燥的情況下可耐受約-5℃的低溫，但在休眠期保持最低5～8℃左右的溫度可減少栽培失敗。

介質與換盆

使用有機物質含量低、排水性極佳的仙人掌專用介質。因易腐爛，應植於不過大的盆器中，每2～3年換盆一次。

繁殖方法

生長快速，從根部長出子球，數年內可擴展至充滿25公分盆器。子株扦插繁殖容易，也可用種子繁殖。

病害蟲與注意事項

使用無機介質、提供充足日照與良好通風的環境下栽培，幾乎不會有蟲害。釣鉤狀的中心刺容易鉤住手和衣物，換盆時應戴厚手套。

關於白毛球

Powder puff cactus (Mammillaria) is a small cactus whose soft white spines make it look like a cotton ball. Stems are 5–8 cm tall (up to 12 cm) and form domed clusters. Beginner-friendly, with care tips and common questions.

開始照料白毛球前需要了解的7件事

1. 1Bright light, good airflow

   Give it a spot with plenty of light and good air circulation. In too little light the body stretches out and the white covering can look thinner. Strong midsummer sun can scorch the plant, so move it to bright partial shade during the hottest weather.

2. 2Water the soil, not the plant

   Water only after the soil has dried out completely, and pour it around the pot edge or the base of the plant. Water trapped among the hairs can cause rot and stains, so avoid drenching the whole plant from above. After watering, wait until the soil dries again before the next round.

3. 3Choose a fast-draining mix

   Use a fast-draining cactus and succulent mix. You can buy a ready-made blend, or add akadama or pumice to improve drainage. Roots suffer in constantly wet soil, so pick a pot with a drainage hole.

4. 4Repot in the growing season

   Repot when the pot becomes crowded or the soil has worn out. Spring or autumn, the main growing seasons, is the best time. Skip watering right after repotting and wait a few days so any root damage can settle before you resume.

5. 5Adjust care by season

   Treat it like a summer-growing succulent. Water regularly in summer, but it is very sensitive to excess moisture, so don't overdo it; too much water combined with too much shade makes the plant swell and lose its shape. In winter, keep it dry with good airflow, and bring it to a bright indoor spot away from frost and freezing.

6. 6How to choose a healthy plant

   Look for a plump, firm body with no discoloration or soft spots at the base. Check that no cottony insects such as mealybugs are hiding among the white hairs, and that the covering looks even. For a clustered plant, also look at how the offsets are arranged and how balanced the whole clump is.

7. 7Beware of hooked spines

   Under the white hairs are brown central spines with hooked tips. They catch easily on skin and clothing, so use tongs, folded paper, or thick gloves when repotting or moving the plant. It is also wise to keep it out of reach of small children and pets.

白毛球的常見問題

Q.Can beginners grow Powder puff cactus?

A.Yes, it is rated beginner-friendly. Keep it in a bright, airy spot and water only after the soil has dried, and it is easy to look after.

Q.How big does it get?

A.Stems are 5–8 cm tall (up to 12 cm) and 3–6 cm across (up to 8 cm). The plant forms clusters that grow into a large dome.

Q.Is it safe to touch the fluffy white part?

A.It looks like soft fur, but it is actually made of hair-like spines. Hooked central spines hide underneath, so avoid touching it bare-handed and use tongs or thick gloves.

Q.How often should I water it?

A.It depends on the location and season, so go by how dry the soil is rather than a fixed schedule. Treat it as a summer grower: in summer, water regularly at the base whenever the soil has dried, without overdoing it, and in winter keep it dry with good airflow.

Q.How long does it live?

A.It is a perennial, but there is little documentation on its lifespan, so no clear number of years can be given. Sticking to the basics of good light, drainage, and careful watering is the best way to keep it healthy for a long time.

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