Vitax Cacti & Succulent Soluble Feed is a soluble fertilizer that is high in potash & low in nitrogen. Use Cacti feed every second watering from spring, making sure that soil does not become waterlogged, as cacti and succulent plants like dry conditions. Mix 0.5g of Vitax Cacti Feed in 1 litre of water. Use every other watering from spring onwards. During the winter season cacti and succulent plants may need infrequent watering (e.g., once every 3 months).