Plant Care Kalm's St. Johns wort

Kalm's St. Johns wort

Taxonomy

Hypericum kalmianum
Hypericum
Hypericaceae
Malpighiales

How to care for Kalm's St. Johns wort

Water

How often to water your Kalm's St. Johns wort

Water needs for Kalm's St. Johns wort
0.5 cups
every 9

Kalm's St. Johns 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 Boise, Idaho.

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

Water 0.5 cups every
9

Does your plant get direct sunlight?

Select the pot size

5"
Light

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 Kalm's St. Johns wort in Boise, Idaho

Boise, Idaho

44% Low

Growing Kalm's St. Johns wort in Boise right now

Light needs for plant Kalm's St. Johns wort in Boise, Idaho

Plant growth potential is currently very low 📉

November 26th, 2021

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

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

Read more

Light needs for plant Kalm's St. Johns wort in Boise, Idaho

Sunlight intensity will decrease by 36.1% ☀️

November 24th, 2021

Boise is trending towards lower sunlight intensity!

The amount of sunlight in Boise is expected to decrease by 36.1% over the next 2 weeks to an average of 6.3 megajoules of energy per m2 per day!…

Read more

Light needs for plant Kalm's St. Johns wort in Boise, Idaho

Daylight will decrease by 1.5 hours 📉

November 24th, 2021

This month, Boise is getting an average of 9.4 hours of clear sky sunlight per day.

Hours of daylight will decrease by 14.3% over the next two weeks. Your plants will get 8.8 total hours of daylig…

Read more

Finding light for Kalm's St. Johns wort in your home

Light needs and placement for plant Kalm's St. Johns wort: 1ft from a window
1ft or less from
a window

Kalm's St. Johns 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 Boise, Idaho ⛅.

Kalm's St. Johns wort does not tolerate low-light 🚫.

Nutrients

How to fertilize Kalm's St. Johns wort

Nutrient, fertilizer, and repotting needs for Kalm's St. Johns 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 Kalm's St. Johns wort after it doubles in size or once a year—whichever comes first.

FAQs
Difficulty Level

Kalm's St. Johns wort is generally considered an easy-to-care-for plant and makes a great choice for beginners!


Water Needs
Sunlight Needs
Toxicity
Soil
Fertilizer
Growth Pattern
Growing Outdoors

Care Summary for Kalm's St. Johns wort

Kalm's St. Johns wort


Greg recommends:

Water

0.5 cups every 9 days

Placement

< 1ft from a window

Nutrients

Repot after 2x growth

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

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