Plant Care Agapanthus Praecox

Agapanthus Praecox

Reviewed by: Kiersten Rankel | Last Updated: 11/22/2024

Also known as

Blue Lily, Blue Lily, Common agapanthus, Blue lily, African lily and Lily of the nile

Taxonomy

Agapanthus praecox
Agapanthus
Amaryllidaceae
Asparagales

How to care for Agapanthus Praecox

💦 Water

How often to water your Agapanthus Praecox

Water needs for Agapanthus Praecox
0.5 cups
every 9

Agapanthus Praecox needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.

Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Calculate water needs of Agapanthus Praecox

Water 0.5 cups every
9

Does your plant get direct sunlight?

Select the pot size

5"
☀️ Light

Finding light for Blue Lily in your home

Light needs and placement for plant Agapanthus Praecox: 1ft from a window
1ft or less from
a window

Agapanthus Praecox love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Agapanthus Praecox does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Agapanthus Praecox in your home 🏡.

🪴 Nutrients

How to fertilize Agapanthus Praecox

Nutrient, fertilizer, and repotting needs for Agapanthus Praecox: repot after 2X growth

Most potting soils come with ample nutrients which plants use to produce new growth.

By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.

To replenish this plant's nutrients, repot your Agapanthus Praecox after it doubles in size or once a year—whichever comes first.

💡 FAQs
💦 Water Needs

Agapanthus Praecox prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Blue Lily Water Frequency →

Blue Lily Root Rot →


☀️ Sunlight Needs

Agapanthus Praecox requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.

Blue Lily Light Requirements →

Blue Lily Direct Sunlight Needs & Tolerance →


🐶 🐈 👶 Toxicity

Agapanthus Praecox is not safe to consume. If you, a family member, or a pet has ingested any amount of plant material contact Poison Control, US (800) 222-1222, or your veterinarian. If you have children, cats, or dogs in the home, we suggest keeping this plant out of reach.

Is Blue Lily Edible? →

Blue Lily Toxicity to Cats →

Blue Lily Toxicity to Dogs →

Blue Lily Toxicity to Humans →


🪴 Soil

Agapanthus Praecox does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!

When and How to Successfully Repot Blue Lily →

What Are Healthy Blue Lily Roots →


💩 Fertilizer

Agapanthus Praecox should be repotted after it doubles in size or once a year, whichever comes first. Fresh potting soil has all the nutrients your plant needs, so as long as it’s refreshed yearly, you shouldn’t need to use fertilizer. Remember, plants get their energy from sunlight, not fertilizer!


🌦️ Growing Outdoors

USDA Hardiness Zone
Agapanthus Praecox can be grown outdoors in USDA Hardiness Zones 8a-11b. Find your local hardiness zone here.

Blue Lily Temperature Tolerance →

Blue Lily Hardiness Zones →

Is Blue Lily a Weed? →


🍂 Yellow Leaves

Yellow leaves aren’t always a reason to panic, and can be a normal part of a plant’s life cycle. Unless brand new leaves are turning yellow or all the leaves change color at once, it’s likely just your plant shedding old leaves.

Overwatering and root rot are the most likely cause of problems in Agapanthus Praecox, since they are sensitive to wet soil. The leaves may also appear to be curling or drooping. Less often, yellow leaves are caused by underwatering, nutrient deficiencies, or pests.

Replace soggy soil with fresh, dry soil and download Greg to make sure your plant never gets overwatered again!


🧐 Troubleshooting

When troubleshooting a sad-looking houseplant, start by checking for signs of distress in its leaves, such as yellowing, browning, or drooping, which can indicate overwatering or nutrient deficiencies.

Inspect the soil moisture; too dry or too wet soil can cause problems.

Ensure the plant is getting the right amount of light, as too much or too little can stress it.

Finally, consider environmental factors like temperature and humidity, and adjust care routines accordingly to revive your plant.


Care Summary for Agapanthus Praecox

Agapanthus Praecox

Agapanthus Praecox


Greg recommends:

Water

0.5 cups every 9 days

Placement

< 1ft from a window

Nutrients

Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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