Boum Indoor Expansion Set
The Boum Indoor extension set includes everything you need to keep using your existing Boum system indoors over winter. It consists of a dedicated LED grow light and a Boum Pro balcony planter.
Bring your existing Boum Controller and water tank indoors, fill the balcony planter with houseplant soil and herb seedlings, and position the LED light above the planter (their dimensions are designed to fit together precisely). You can now grow herbs such as rosemary, oregano, thyme and many more indoors all winter long.
If you would like to overwinter your geraniums, we recommend planting them in the Boum balcony planter in autumn and using the LED light to help them through the colder months. This allows them to establish roots throughout winter, ready for the new season in spring.
Shipping starts on 26 October 2026.
Delivery (subject to availability) usually takes 1 - 5 working days.