The Garden Community for Garden Lovers

United Kingdom Gb

I planted a phormium cookanium tricolour about 6 weeks ago. A number of the leaves have turned yellow. What's wrong?


On plant Phormium cookianum


Answers

 

The first question to ask yourself is "Have I been keeping up on the watering?" Unless there has been very heavy rain on a regular basis since you planted it, it would need a thorough soaking about once a week, maybe twice a week in warmer weather. New plants always need regular watering to do well.

Ironically, the second question is "Is there enough soil drainage where I planted it?" In addition to water, roots need oxygen to grow, so after the soil is saturated in a watering, the excess water needs to drain away so air can enter the soil to provide it. Some pernicious fungi also like saturated doil, and Phormiums are susceptible to many of them.

The next question is "Is the soil rich enough to feed the plant?" Phormiums don't need huge amounts of nutrients, but poor sandy or chalky soil can lead to a lack of nitrogen, which can cause the older leaves to yellow, as they sacrifice themselves to support new growth, both of roots and leaves.

If it's just a few yellow leaves, those may just be old leaves whose time has come. Just clip them off, and don't worry.

You might want to inspect the base of the leaves also. On rare occasions, it will come home from the garden center infested with mealybugs, which can then build up to where they are weakening the plant. Look for little blobs of sticky "wool" attached to the bases of the leaves, especially the newest ones.

I hope all this helps!

11 Oct, 2010

 

Thanks for that I will cut 'em off and hope for the best!

11 Oct, 2010

 

Just the yellow ones, Total, and welcome to GoY!

12 Oct, 2010

How do I say thanks?

Answer question

Related photos

  • Phormium Cookianum 'Tricolor' (Phormium cookianum (Mountain flax))
    Simbad
  • Phormium Cookianum 'Tricolor' for Dawn :-) (Phormium cookianum (Mountain flax))
    Simbad
  • Phormium in pot in front of my garage... (Phormium cookianum (Mountain flax))
    Karensusan63
  • P. Jester - Close up..... (Phormium cookianum)
    Majeekahead

Related products

 


Not found an answer?