Plant Care Blue Mountain Lilac

Blue Mountain Lilac

Also known as

blue blossom ceanothus, blueblossom, blueblossum and bluebrush


Ceanothus thyrsiflorus

How to care for Blue Mountain Lilac


How often to water your Blue Mountain Lilac

Water needs for Blue Mountain Lilac
0.5 cups
every 9

Blue Mountain Lilac 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 Blue Mountain Lilac

Water 0.5 cups every

Does your plant get direct sunlight?

Select the pot size


Check the growing potential in your area

A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Blue Mountain Lilac in your home

Light needs and placement for plant Blue Mountain Lilac: 1ft from a window
1ft or less from
a window

Blue Mountain Lilac love being close to bright, sunny windows 😎.

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

Blue Mountain Lilac does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Blue Mountain Lilac in your home 🏡.


How to fertilize Blue Mountain Lilac

Nutrient, fertilizer, and repotting needs for Blue Mountain Lilac: 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 Blue Mountain Lilac after it doubles in size or once a year—whichever comes first.

Difficulty Level

Blue Mountain Lilac is generally considered an easy-to-care-for plant and makes a great choice for beginners!

Water Needs
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for Blue Mountain Lilac

Blue Mountain Lilac

Blue Mountain Lilac

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


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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