Even seemingly harmless flowers such as tulips or daffodils can pose a health risk. Anyone who works a lot with tulips should wear gloves as they can cause unpleasant skin reactions.
If you notice red welts on your arms in the spring after working in the garden or on the balcony, you may have just planted hyacinths. In the case of lily of the valley, larger quantities can even cause cardiac arrhythmias. If poisonous plant parts are swallowed, the first aid measure recommended is to drink large amounts of water and consult a doctor immediately.