Mule Palm Problem?

[KDubU]

My big mule palm has been doing very well but I have noticed in the past couple weeks some fronds changing colour. I put it down to changing of the seasons and cooler nights but now am concerned. I have only had to trim one frond all summer and now another is brown and am fine with that. It’s the ones I have taken photos of that are concerning me. Thoughts?

 

 

Edited November 13, 2021 by KDubU

[KDubU]

I personally think is it a potassium deficiency after doing some research.

[Kailua_Krish]

I agree

[Darold Petty]

Classic example of potassium deficiency.  

[Merlyn]

Yep, looks like Potassium deficiency.  Here's my cheat sheet for common visual signs:

• Nitrogen - Older fronds turn light green uniformly, new fronds remain dark green until deficiency is really severe
• Potassium - Older fronds get translucent yellow/orange or dead spots on leaves, especially at the tips. Sometimes tips are curled or frizzled. Always starts at tips of oldest leaves, moving inwards
• Magnesium - Yellow linear bands on leaves but generally transitions to solid green at the base of each leaf. Never causes leaf tip necrosis
• Iron - Many times caused by overly mucky soil and root rot. Starts with new spear leaves with yellow-green or even white, possibly with spots of green.
• Manganese - Lengthwise necrotic streaks in leaves with dead and curled leaf tips. Similar to bands showing Magnesium deficiency
• Boron - Bent or necrotic or distorted leaf tips, distorted or bent spear, bands of dead spots on new fans, spears that won't fully open
• Water - Underwatering brown at the edges first, later followed by yellowing of the whole leaf. Overwatering can be drooping fronds turning yellowish and losing color

[KDubU]

Tks everyone for confirming and that’s a good list @Merlyn!