How much food do they need?
Due to their size, larger plants need much more food than the 5cm potted plants so this has to be considered when planting.
What fertilisers should I offer?
We always recommend using both a nutrient rich fertiliser and a liquid carbon for all plants. Use Neutro T as a liquid fertiliser and Neutro CO2 for your carbon. Both are available in big bottles and if you are injecting pressurised CO2, sway the Neutro T for Neutro+.
Are root tabs needed?
If you want to get the best from your plants, so they stay strong, grow faster and produce better colours then yes. Use TerraTabs for best results. Insert 3 under each XL plant every 4 months.