PottingAgapanthus is a real sun worshipper and especially useful as a potted plant for the terrace or balcony.
Use a one gallon pot or larger with a soil mix of 60% good potting soil and 40% sand, building or river sand (rinse first because of salt contents). The sand is good for drainage. Make sure to use a pot with a hole in the bottom to avoid excess water. Agapanthus don’t like wet feet!
In the spring, place the plant (preferably in a bowl) outside in a sunny spot. When you are expecting frost, cover the plant with a cloth, plastic with air bubbles or a bag of cloth.
Water the plant regularly in the soil or bowl during the growth period between April and September. From May till August, apply a small amount of fertilizer once a month. For nutrition you can use cow manure grains or N.P.K. grains. N.P.K= Nitrogen, Phosphor, Potassium. These are available at your local garden centre and should be used in the mixture of 7.14.28 or 12.10.18. Too much Nitrogen will result in fast growth of the foliage, which in turn will give less flowers.
FrostAfter flowering you can leave the plant outside until the beginning of frost because Agapanthus is not winter hardy. Temperatures lower than -5°C can be fatal for the plant.
You can keep it in the shed or basement (maximum temperature 8°C). Should you have Agapanthus planted in your border, then you can’t bring it inside. You will have to protect it until April with a thick layer of leaves or straw with a layer of plastic in between.
You will not have to water the plant during the winter as the plant is in dormancy. Furthermore, a wet mound only increases the chance of freezing.
We hope you enjoy your Agapanthus.