Herbs and roots are a cornerstone of good spellwork. While it is certainly possible to perform spells and rituals without them, their energies are indispensable to many practitioners. When you perform your next spell, consider including some of these herbs and roots in order to benefit from their magical properties.
You can drink some of them in a tea to infuse yourself with these plant's energies (not all of them can be ingested. Make sure to read carefully).
You can roll a dressed candle in them to enhance your work.
You can steep them and use the water in a spiritual cleansing wash for mop water and/or a household cleaning spray.