I've bought my plant and after a few days the edges (not the tips) of several leaves started to darken (photo). Could it be because of the transportation? Although it was warm, there was air draft in the subway. Or could it be caused by tap water? Is it serious? Thank you, Jacob
The leaf tips turning black could be due to temperature changes.
This is a tropical loving plant, so cold temps can cause this.
Well draining soil is important. Over watering can cause issues.
Dracaena don't like salts or fluoride in water, so using distilled water can be a help.
This link will refresh you on the care requirements.