leaves on my lemon tree going yellow

Question From: 
julian in  st albans,  melbourne VIC

 

Nature of problem: 
leaves on my lemon tree going yellow

 

Type of Plant (if known): 
lisborn/eureka

 

Symptoms of Plant Illness (please try NOT to diagnose your problems yourself): 
leaves are changing to yellow color

 

Soil Type (e.g. sandy, clay or loam) OR Potting Mix Type: 
potting mix

 

How often do you water the plant:
daily

 

How many hours of sunlight does the plant get each day:
full sun

 

What type of plant is it:
citrus

 

How long since you planted it:
repotted apox 6 weeks ago

 

Have you fertilised? If so, with what and when:
no

 

Is the plant indoors or outdoors: 
outdoors

 

What other treatments have you given the plant: 
none

Upload photo if available: 
019.JPG

Other Comments: 
this thing wont let me upload pic i got them from a market about 6 weeks ago 1 lemon 1 cumquat i repotted them into bigger pots as i dont want them in the ground as yet they are both slowly going yellow in the leaves is it lack of fertilizer if so what should i give them my first time growing this type of tree i water them in the mornings

 

Answer: Hi Julian,  This is a VERY healthy citrus tree. Everyone memorise this as it is a classic case of nitrogen deficiency – note the yellowish green colour of the  new growth. All that you need to do is to fertilise this tree with some citrus food right away and this will be the best citrus tree in Melbourne.  Well done,  Don