Plant Care Tree Onion

Tree Onion

About Tree Onion

Tree Onion is a super rare houseplant 🌿 that needs regular watering to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

Tree Onion likes soil that is well draining. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.


Allium proliferum

Also known as

Topsetting Onions and Walking Onions

How to care for Tree Onion


How often to water your Tree Onion

Water needs for Tree Onion
0.5 cups
every 9

Tree Onion needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in San Francisco, California.

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 Tree Onion

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 Tree Onion in San Francisco, California

San Francisco, California

48% Low

Growing Tree Onion in San Francisco right now

Light needs for plant Tree Onion in San Francisco, California

Plant growth potential is currently low 📉

December 6th, 2021

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

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

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Light needs for plant Tree Onion in San Francisco, California

Sunlight intensity will decrease by 22.9% ☀️

December 6th, 2021

San Francisco is trending towards lower sunlight intensity!

The amount of sunlight in San Francisco is expected to decrease by 22.9% over the next 2 weeks to an average of 8.3 megajoules of energy…

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Light needs for plant Tree Onion in San Francisco, California

Daylight will decrease by 0.9 hours 📉

December 6th, 2021

This month, San Francisco is getting an average of 9.7 hours of clear sky sunlight per day.

Hours of daylight will decrease by 8.4% over the next two weeks. Your plants will get 9.4 total hours of…

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Finding light for Tree Onion in your home

Light needs and placement for plant Tree Onion: 1ft from a window
1ft or less from
a window

Tree Onion 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 San Francisco, California ⛅.

Tree Onion does not tolerate low-light 🚫.


How to fertilize Tree Onion

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

When to repot Tree Onion

Nutrient needs for plant Tree Onion in San Francisco, California

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

December 6th, 2021

The growing potential in San Francisco is 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 best to…

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Water Needs
Sunlight Needs

Care Summary for Tree Onion

Tree Onion

Tree Onion

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

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

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