The Forum

Get help, share your knowledge

You are not logged in

Burke's Backyard Forum > Growing fruit and vegetables  
Author Posts  

janetwil
Forum newbie - be nice!

Posts: 1
Location:
Registered: January 2009

Citrus trees fertilizer

Posted 2061 days ago

We have 2yr old citrus trees - orange, lemon, grapefruit, mandarin - I would like some information on when to fertilize and what to use. One of the trees has thick black film over the leaves which does wipe off - what would be the cause of this and how it be treated. We live on the Sunshine Coast in Qld.

0
0


Alert moderator

 

Ozmac
Forum stalwart

Posts: 181
Location: Sydney
Registered: September 2007

RE: Citrus trees fertilizer

Posted 2055 days ago

As for fertilisers for citrus, there are specialist citrus foods available at any nursery. It's almost the same stuff as rose food so if you already have some rose food, use that. Or you could use Dynamic Lifter for Citrus, which is chicken poo with added extras, or just plain old Dynamic Lifter or Rooster Booster is fine, too. Juts apply the amount given on the package. With citrus in the ground, fertilise every year in February and August. Water the ground well both before and after fertilising, so the best idea is to wait for a rainy day, and do the fertilising then, letting the rain wet the soil first, then letting the rain water in the fertiliser afterwards as well.

With citrus grown in pots, you feed them differently. Lighter feeds every six weeks is the ideal, but you could also try a slow-release fertiliser such as Osmocote for Citrus and Fruit every few months for a slow-trickle style of feeding, which can work well.

As for the black film on the leaves, that's sooty mould, and it's caused by aphids higher up in the tree leaking sweet honeydew onto the leaves, which then causes the sooty mould to form. Get rid of the aphids (by hand, or by using a pyrethrum spray) and the honeydew should go away. The sooty mould isn't really the problem, it's just a by-product of the real problem.
_________
I'm a blogger! http://gardenamateur.blogspot.com

0
0


Alert moderator

 

bron74
Forum newbie - be nice!

Posts: 26
Location: Perth, WA
Registered: November 2008

RE: Citrus tree Ozmac

Posted 2027 days ago

Hello Ozmac,
Thank-you for replying my post. My lemon tree lives in a self watering pot. As I live in Perth and are renting, but luck to have a courtyard my tree see's the morning and afternoon sun. So I could say it gets the sunlight all day. When I purchased the tree I brought myself a tub of that dynamic lifter for citrus tree's and have followed the instructions as they.
I water my plants every 2nd day, and all get a good watering.
Since my post, I have brought some white oil and have been spraying that on the tree. It has helped and I am now seeing some new growth, but the lemon that started growing before the white scale have not grown since. But am staying postive that I will see some positve improvement. Thank you for your reply and will keep your advise in tow.
happy gardening..

0
0


Alert moderator

 

bron74
Forum newbie - be nice!

Posts: 26
Location: Perth, WA
Registered: November 2008

RE: lemons delight

Posted 1873 days ago

Hello Ozmac,
As promised a update on my lemon tree, after a few stressful months for me I can now say my lemon tree is looking alot healthier and has produce some lovely lemons to enjoy each day. Thank-you for you advice, and happy gardening.
Cheers mate.

0
0


Alert moderator