Plant Care Black Swallow-Wort

Black Swallow-Wort

Also known as

Louise's swallow-wort, Louise's swallow-wort, Black swllowwort, Black swallow-wort and Black dog-strangling vine


Vincetoxicum nigrum

How to care for Black Swallow-Wort


How often to water your Black Swallow-Wort

Water needs for Black Swallow-Wort
0.5 cups
every 9

Black Swallow-Wort needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in Philadelphia, Pennsylvania.

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 Black Swallow-Wort

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.

Plant care guide for Black Swallow-Wort in Philadelphia, Pennsylvania

Philadelphia, Pennsylvania

45% Low

Growing Black Swallow-Wort in Philadelphia right now

Light needs for plant Black Swallow-Wort in Philadelphia, Pennsylvania

Plant growth potential is currently low 📉

November 27th, 2021

Sunlight intensity as measured by “net radiation” in Philadelphia is currently low 📉.

The availability of high quality sunlight in your home impacts ability for plants to thrive and is key in dete…

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Light needs for plant Black Swallow-Wort in Philadelphia, Pennsylvania

Sunlight intensity will decrease by 31.2% ☀️

November 27th, 2021

Philadelphia is trending towards lower sunlight intensity!

The amount of sunlight in Philadelphia is expected to decrease by 31.2% over the next 2 weeks to an average of 6.9 megajoules of energy p…

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Light needs for plant Black Swallow-Wort in Philadelphia, Pennsylvania

Daylight will decrease by 1.3 hours 📉

November 26th, 2021

This month, Philadelphia is getting an average of 8.4 hours of clear sky sunlight per day.

Hours of daylight will decrease by 12% over the next two weeks. Your plants will get 9.2 total hours of d…

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Finding light for Louise's swallow-wort in your home

Light needs and placement for plant Black Swallow-Wort: 1ft from a window
1ft or less from
a window

Black Swallow-Wort love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to ensure it receives enough light to survive during this time of reduced sunlight intensity in Philadelphia, Pennsylvania ⛅.

Black Swallow-Wort does not tolerate low-light 🚫.


How to fertilize Black Swallow-Wort

Nutrient, fertilizer, and repotting needs for Black Swallow-Wort: 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 Black Swallow-Wort after it doubles in size or once a year—whichever comes first.

When to repot Black Swallow-Wort

Nutrient needs for plant Black Swallow-Wort in Philadelphia, Pennsylvania

Is this a good time of year to repot? No ⏳

November 22nd, 2021

The growing potential in Philadelphia is very low 📉.

Repotting in late fall or winter when the day lengths are shorter can be very stressful for a plant and cause it to go into shock.

It's bes…

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Sunlight Needs

Care Summary for Black Swallow-Wort

Black Swallow-Wort

Black Swallow-Wort

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

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

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