Indoor Plants for Your Health

By Ava Green

Usually, by the time February or March rolls around, I’m pretty tired of the health crazes like extreme diets and exercise plans I’ve been trying for the fifth year in a row. This year, let’s take a look at something that naturally supports our good health, both mental and physical. It’s time to stop and “smell the flowers,” so to speak.

Mental and Physical Health

Many gardeners already realize this, but studies are showing that simply seeing greenery can benefit our mental health. Whether it's a walk in the woods or a handful of houseplants, seeing green leaves makes a difference for humans! Research shows that it helps boost our mood and improve how we get along with people. Who doesn’t need a mood booster during cold, dark days? And getting along with people, well, the world just needs more of that, too, doesn’t it?

You may also already know that tending to plants reduces stress, but did you know that science is proving it? PubMed published a study stating:

"Interaction with indoor plants may reduce psychological and physiological stress by suppressing autonomic nervous system activity in young adults: a randomized crossover study."

This isn’t the common thinking about working outside in the garden increasing physical strength and stamina. It’s a study that examines our autonomic nervous system, the one responsible for automatic and essential bodily functions we don’t even think about, like breathing. The study compared participants performing two tasks: one on a computer and the other doing plant transplanting. The results suggest that interaction with plants indeed reduce stress without us even thinking about it! No task that requires willpower, just daily tending to plants like transplanting, watering, dusting, pruning, or turning the pots to get sun on the flipside.

So plants boost our mood, improve interactions with others and physically reduce our stress levels without us even trying. It’s no wonder we just feel better when we’re around plants.

Air Quality

Research also shows that indoor air pollution is often worse than outdoor air pollution. VOCs (Volatile Organic Compounds) from washing detergents, paint, furnishings, and building materials, as well as bacteria, fungal spores, and dust, negatively affect human health.

Fresh air can counter the impact of indoor pollutants, but often it’s too cold to open the windows in the middle of winter. When you can’t let fresh air into the house, indoor plants will help. We know that growing trees outdoors has a massive impact on air quality and the health of the planet, and inside our home, tropical plants contribute in the same way. The contribution of each type of plant varies, so having a variety is a very good idea.

What to Grow

Here’s a list of easy-to-grow, green indoor plants that Eising’s resident tropical plant expert, Courtney, and the UK’s Royal Horticultural Society (RHS) recommend:

Aglaonema ‘Silver Queen’ (Chinese evergreen ‘Silver Queen’)

Aspidistra elatior (common Aspidistra, Cast Iron plant)

Chamaedorea elegans (Parlour Palm)

Chamaedorea seifrizii (Bamboo Palm)

Chlorophytum comosum (Spider Plant)

Crassula ovata (syn. Crassula portulacea) (Jade plant, Jade tree)

Dracaena fragrans ‘Janet Craig’ (Dragon Plant)

Dieffenbachia ‘Tropic Snow’ (v) (Dumb Cane)

Dracaena marginata (v) (Madagascar dragon tree)

Epipremnum aureum and ‘Marble Queen’

Ferns - many types

Ficus elastica (Rubber tree, Rubber plant)

Hedera helix (English ivy, common ivy)

Howea forsteriana (Flat Palm, Kentia palm)

Rhapis excelsa (Bamboo Palm, Lady Palm)

Sansevieria (Snake Plant) - many types

Spathiphyllum sp. (Peace Lily)

Syngonium podophyllum (Nephthytis)

Zamioculcas zamiifolia (ZZ plant, fern arum)

Is there a downside to having houseplants? Yes, if you have small children or pets, be mindful of the plants that can be toxic if ingested (see resources listed below).

While many of us in Ontario focus on “nice” weather and getting outside to garden, it’s pretty clear that our indoor plants do much of the heavy lifting to improve our health through the cooler seasons. Even if you don’t have a “green thumb”, it’s worth giving tropical, indoor houseplants their well-deserved space in our homes, hospitals, offices, nursing homes, classrooms, restaurants…or any indoor space!

Resources:

PubMed study on indoor plants and their impact on human stress - https://pmc.ncbi.nlm.nih.gov/articles/PMC4419447/

Sally Augustin, PhD, Environmental Psychologist - https://www.psychologytoday.com/ca/blog/people-places-and-things/201802/benefits-of-the-indoor-plant

RHS - https://www.rhs.org.uk/plants/types/houseplants/for-human-health

For a list of indoor plants and the VOCs they have the potential to reduce, PubMed review article by Dela Cruz et al., 2014 - https://pubmed.ncbi.nlm.nih.gov/25056742/

PETAs list of plants that are safe for pets: https://www.peta.org/living/humane-home/animal-friendly-houseplants/?utm_source=PETA::Google&utm_medium=Ad&utm_campaign=0422::veg::PETA::Google::SEA-Vegan-Grant::::searchad&gad_source=1&gad_campaignid=96533821&gbraid=0AAAAADu2DAt3SGF9vPRkHJqkNw-eZ6kEH&gclid=CjwKCAiAvaLLBhBFEiwAYCNTf9nyavbUnefHx0FaUekq4HZyXPrIwYhnJqgnu_g_TPea3nExhT-jOhoCqLUQAvD_BwE

RHS list of safest plants for children: https://www.rhs.org.uk/plants/types/houseplants/houseplants-for-children