what is a good fertillizer for lemon trees?

Question

our lemon tree has been producing small lemons for a couple of years and the leaves a a yellow the branches have a scaley substance on them

Answer 1

Citrus fertilizers should be balanced such as a 10-10-10 or a 15-5-15 with about 2% magnesium (Mg), 1 to 2% iron (Fe), about 0.5% manganese (Mn), and some copper (Cu), zinc (Zn) and boron (B).

To effectively control citrus scale try using an Insecticidal soap or a spray oil.

Insecticidal soaps block the breathing pores and dissolve the scales outer covering so they dehydrate and die. Soap sprays contain potassium and will not harm beneficial insects and have a very low toxicity to people or pets.

Spray oils, such as a narrow range 440 oil, can be used but you'll have to be careful not to spray if you experience warm temperatures during application since it may burn your lemons and their leaves.

Hope this solves your problems. GOOD LUCK!

(certified professional crop consultant with a degree in plant science)

Answer 2

It probably needs more nitrogen (yellow leaves). Lemon trees are very hungry feeders. The scaly stuff is scale insects which are sucking on the sap of the branches - this will also be starving the leaves. You probably have a black sooty mould as well, which grows on the by-products of the scale. You can get rid of scale by spraying with a Pest Oil (quite safe and organically acceptable). Do this in coolish weather: not today if you're in Southeast Australia!

Use a commercial citrus food, or pelleted organic fertilizer from the hardware store.

By the way, most suburban back yards in Melbourne, Australia have a lemon tree. It is considered good manners for gentlemen to pee around the root zone, which provides the tree with nitrogen rich urea, and saves the water that would be used for flushing a toilet. (We have a drought at the moment!) It is considered optional for ladies.

Answer 3

An acid fertilizer with a higher nitrogen content, lower phosphorus,and a medium potassium would be a good fertilizer. (5-1-3) Try to use something that has micro nutrients like Magnesium, Boron, Copper and Zinc. Esp. the magnesium part.

Answer 4

the demands of lemon & all citrus trees for that matter are relatively high,a good balaned general fertiliser will answer the main nutritional problem ,thrips & aphids are a common menace,a good organic oil spray should be tried first,only then should one resort to chemical pesticides.yellowing leaves are an indiaction of micro nutrient deficiencies this can be overcome by spraying a micro nutrient specially formualted for citrus plants,mixing a good quality compost into the surrounding soil helps a lot in keeping the plant healthy & disease resistant. compost needs to be applied in bulk to make a significant contribution .,

Answer 5

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Good Luck and Best Wishes!