Ask a Question forum→Why are new leaves on Calathea forming with crispy, dry tips? Please help

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London
Adamantant
May 31, 2020 8:26 AM CST
Hi Guys,

I have a Calathea plant and the new leaves it's growing are forming with crispy, dried out tips. (Please see photos)

Does anyone know the reason for this and what I can do to prevent it?

The rest of the plants look healthy but it's just the new leaves growing this spring that have this. They are already have the dried tips even before unfurling it appears.

My research on internet suggests it could be low humidity. However, that room is consistently 50% humidity. I run a humidifier and there are other Calathea in the room without the same issue.

Any advice would be much appreciate.

Many thanks,
Adam
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[Last edited by Adamantant - May 31, 2020 8:34 AM (+)]
Give a thumbs up | Quote | Post #2258286 (1)
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
May 31, 2020 8:34 AM CST
How do you decide when to water your plant and how much do you give it?

How long have you had it?
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
London
Adamantant
Jun 2, 2020 3:30 PM CST
Hi Will,

I've had the plant about a year. The problem has started with the new growth this Spring.

I usually bottom water it. And flush it every 5-6 months

I decide when it needs watering using a moisture meter. I wait until it goes from 'Moist' reading and as soon it starts to enter 'Dry', I water.

On the meter, 1-3 = dry 4-7 = moist and 8-10 = wet.

Do you think it's do with irregular watering?
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jun 2, 2020 5:26 PM CST
Even if your moisture meter is accurate, and it probably is not, then you are letting the soil get too dry. It is much more difficult to water properly from the bottom.

I suggest that you let the top half-inch of soil feel dry to your touch before watering it thoroughly from the top until a bit of water trickles through the drain holes. Remove any excess water that collects under the pot.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
London
Adamantant
Jun 4, 2020 1:02 AM CST
Ok thank you as always Will. Think I have been letting it get too dry Especially with recent hot weather here in the U.K.

I'm surprised you say bottom watering is more difficult. I assumed this way the plant takes up the necessary amount of water and prevents over/under watering.

Should I stop bottom watering all my plants?

I bottom water all of them and it takes over an hour and a half to water all my plants lol

Thanks in advance
Adam
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jun 4, 2020 9:07 AM CST
Perhaps I am more impatient than you, Adam. Bottom watering does take a long time, as you acknowledge, and requires careful monitoring to determine when it has wicked up enough. For me, it seems much easier and quicker to pour in some water from the top and stop when a bit trickles through.

Under and over watering are a result of waiting wither too long or not long enough between watering intervals regardless of how you water.

That said, if your technique has been working for you there is no reason to change. Thumbs up

Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
Name: one-eye-luke US.Vet.
Texas (Zone 8a)
Quitter's never Win
Hummingbirder Birds Organic Gardener Dog Lover Cat Lover
oneeyeluke
Jun 5, 2020 12:33 AM CST
Anytime I bottom water, I measure the amount of water that goes on bottom and top to make sure the plant gets the right amount. You have to know the water volume or amount the container holds first.
NOT A EXPERT! Just a grow worm! I never met a plant I didn’t love.✌

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