Plant Care Blue Tansy

Blue Tansy

About Blue Tansy

Scorpian weed is an annual widely used in Europe and is gaining traction in the US. It propagates easily from seed and is attractive to pollinators. It is drought tolerant, prefers full sun and withstands sandy or rocky soil. It's winter hardy to 18 degrees F.


Phacelia congesta

Also known as

Lacy Phacelia, Lacy Phacelia, Blue tansy and Purple tansy

How to care for Blue Tansy


How often to water your Blue Tansy

Water needs for Blue Tansy
0.5 cups
every 9

Blue Tansy 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 Tansy

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 Lacy Phacelia in your home

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

Blue Tansy love being close to bright, sunny windows 😎.

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

Blue Tansy does not tolerate low-light 🚫.

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


How to fertilize Blue Tansy

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

Difficulty Level

Blue Tansy is generally easy to care for, though some plant parents report facing challenges with growing it. Check out the reviews down below to read more about their experiences!

Water Needs
Sunlight Needs
Growth Pattern

Care Summary for Blue Tansy

Blue Tansy

Blue Tansy

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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