Plant Care Thelocactus macdowellii

Thelocactus macdowellii

Taxonomy

Thelocactus macdowellii
Thelocactus
Cactaceae
Caryophyllales

How to care for Thelocactus macdowellii

Water

How often to water your Thelocactus macdowellii

Water needs for Thelocactus macdowellii
0.5 cups
every 12

Thelocactus macdowellii needs 0.5 cups of water every 12 when it doesn’t get direct sunlight and is potted in a 5" pot located in Tucson, Arizona.

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 Thelocactus macdowellii

Water 0.5 cups every
12

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 Thelocactus macdowellii in Tucson, Arizona

Tucson, Arizona

60% Medium

Growing Thelocactus macdowellii in Tucson right now

Light needs for plant Thelocactus macdowellii in Tucson, Arizona

Plant growth potential is currently low 📉

December 2nd, 2021

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

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

Read more

Light needs for plant Thelocactus macdowellii in Tucson, Arizona

Sunlight intensity will decrease by 19.7% ☀️

December 3rd, 2021

Tucson is trending towards lower sunlight intensity!

The amount of sunlight in Tucson is expected to decrease by 19.7% over the next 2 weeks to an average of 10.6 megajoules of energy per m2 per d…

Read more

Light needs for plant Thelocactus macdowellii in Tucson, Arizona

Daylight will decrease by 0.8 hours 📉

December 3rd, 2021

This month, Tucson is getting an average of 10.7 hours of clear sky sunlight per day.

Hours of daylight will decrease by 7.1% over the next two weeks. Your plants will get 9.9 total hours of dayli…

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Finding light for Thelocactus macdowellii in your home

Light needs and placement for plant Thelocactus macdowellii: 1ft from a window
1ft or less from
a window

Thelocactus macdowellii love being close to bright, sunny windows 😎.

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

Thelocactus macdowellii does not tolerate low light 🚫.

Tucson, Arizona currently has medium levels of sunlight intensity, you can help this plant grow by treating it to ample light ☀️.

Nutrients

How to fertilize Thelocactus macdowellii

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

FAQs
Water Needs
Sunlight Needs
Toxicity

Care Summary for Thelocactus macdowellii

Thelocactus macdowellii

Thelocactus macdowellii


Greg recommends:

Water

0.5 cups every 12 days

Placement

< 1ft from a window

Nutrients

Repot after 2x growth

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

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