What is the ruling on opening a shop selling seedlings and roses in a European country where the majority of customers are disbelievers who may use them for forbidden purposes such as parties and gifts for lovers? And what is the ruling on selling them during Valentine's Day without being certain of the buyer's intention?

The basic principle regarding permissible goods that may be used for unlawful purposes is that their sale is permissible, unless it is known that the buyer will use them for an unlawful purpose. Some scholars believe that a strong presumption is sufficient. The majority of scholars stipulated that to prohibit the sale of juice to someone who will make wine from it, the seller must know the buyer's intention. In contrast, the Shafi'is and Ibn Taymiyyah considered the seller's presumption to be sufficient. If the seller does not know or has doubts, the majority of scholars consider it permissible, while the Shafi'is consider it disliked (makruh).

Therefore, selling roses and similar items to disbelievers is permissible, unless it is known that the buyer will use them for an unlawful purpose. However, during Valentine's Day, there is strong evidence that the buyer intends to celebrate this forbidden holiday. It is more prudent to refrain from selling roses during this time, unless it is known or strongly presumed that the buyer will not use them for celebrating it.