Ask a Question forum: How hot is too hot for Boston ferns?

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Name: Toru Kawahata
Shizuoka, Japan
Jul 7, 2016 6:35 AM CST
I recently acquired Boston fern and put it in my room. The temperature here is about 30°C and the humidity is around 50 to 70%. Also the fern is located away from direct sunlight in shade! Is it too hot for my fern to be in my room? I feel it's a bit sickly looking
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Name: Lin
Sebastian, Florida (Zone 10a)

Region: United States of America Bookworm Keeper of Koi Morning Glories Region: Florida Houseplants
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Jul 7, 2016 9:58 AM CST
Hi toruk15, Welcome!
Your Boston Fern (Nephrolepis exaltata) looks fine to me. The growth habit of your plant seems to be leaning/favoring one side so perhaps rotating it towards the bright light on occasion is needed for more uniform growth. Temperature levels of @30ºC/86ºF sounds perfect if the air circulation and humidity levels are sufficient. The Boston Fern thrives with high humidity of around 80% so you might want to mist occasionally to raise the humidity around the plant but it's very important to have good air circulation also, especially when it's hot and humid. Outside, this plant prefers a shady situation but when grown indoors they require bright, filtered light so if you can place it as close to a window as possible without it getting sunburned, it should do well. The Boston Fern is more drought tolerant than other ferns so make sure the soil is damp but not soggy.
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Name: Daisy
Reno, Nv (Zone 6b)
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Garden Sages Plant Identifier
Jul 7, 2016 10:22 AM CST
Misting plants only raises the humidity level while you are misting. The only thing you will manage to do is ruin your funiture.

The fronds do look a little yellow so some fertilizer would help. The oldest fronds wll yellow and die but the plant will continue to grow new fronds.

Your Boston Fern will quickly out grow its pot but you can keep it manageable by pullng it out of the pot and cutting the plant into smaller pieces. Plant up one and give the rest away.
Name: Karen
NM , AZ (Zone 7b)
Region: New Mexico Region: Arizona Greenhouse Cactus and Succulents Adeniums Sempervivums
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Jul 7, 2016 10:44 AM CST
Welcome! @toruk15.
One year I grew a Boston fern outside all summer in Arizona. It was next to a small waterfall feature, and kept watered on a dripper. It was in shade under the eaves of my house. The temps went to 119 that year. It grew happily, so I don't think you have to worry about the temperature in your home.
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Name: Cheryl
Kingwood, Texas (Zone 9a)
Region: Texas Greenhouse Composter Plant Identifier Plant Lover: Loves 'em all! Amaryllis
Plumerias Ponds Foliage Fan Enjoys or suffers hot summers Tropicals Garden Ideas: Master Level
Jul 7, 2016 11:04 AM CST
My GF grows her's in partial sun. Mine is in bright shade. Both of ours do very well. Her fronds are not as soft as mine and grow faster. Both of ours receive a ton of water. We have a lot of humidity but they also like a misting quite often. So given the two different sun exposures it may be the water and humidity it receives that makes the difference. Agree with the fertilizer. It needs greening up but your plant looks wonderful. Keep up the good work! Thumbs up Welcome! Welcome!
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Name: Karen
NM , AZ (Zone 7b)
Region: New Mexico Region: Arizona Greenhouse Cactus and Succulents Adeniums Sempervivums
Salvias Garden Art Plumerias Bookworm Hibiscus Houseplants
Jul 7, 2016 11:06 AM CST
Your fern does look great! I gave up on having them indoors because they were so messy, always dropping bits of leaves. It's a pain always cleaning them up.
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