Lemon Trees
Q.

Gardening – Tree planting – leaf problem in lemon tree

Zone George, Western Cape, South Africa (Southern Hemisphere) | Anonymous added on January 7, 2018 | Answered

What trees can I grow in containers? Custard apple? Lemon tree? Paw paws? Orange? I\'ve got a very young lemon tree which keeps getting some white stuff stuck on the bottom sides of the leaves and the little black ants come and eat (?) the stuff.

A.
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Downtoearthdigs
Certified GKH Gardening Expert
Answered on January 8, 2018

The white stuff is probably honeydew, a sticky substance left by aphids, scale bugs, and other small insects that feed on plants. Ants enjoy eating honeydew:
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-aphids-and-ants.htm
https://www.gardeningknowhow.com/garden-how-to/info/what-is-honeydew.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/controlling-citrus-scale.htm

Some lemon trees and some orage trees can be grown in containers. Meyer lemon is particularly well suited:
https://www.gardeningknowhow.com/edible/fruits/lemons/growing-meyer-lemons.htm
https://www.gardeningknowhow.com/edible/fruits/oranges/orange-tree-container-care.htm

Custard apple is a relatively small tree, and some gardeners have said they've been successful growing it in pots. Here is more information on its growth needs:
https://hort.purdue.edu/newcrop/morton/custard_apple.html

Paw paws produce a deep tap root (plunging root), so they probably wouldn't adapt well to growing in a container.

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