How do I keep my houseplants looking great? Don't let them go hungry Packed full of all the essential nutrients your houseplants need to thrive, feeding with Westland Houseplant Feed is the secret to lush, healthy houseplants! Are they thirsty? Don't let your plants get stressed! Under or over watering your plants can often lead to pest and disease problems. Top tip - use a Westland Houseplant Watering Indicator so you know exactly when to water, they change colour when your plant needs a drink.