Things are looking pretty good so far. I assume that you have watered it by now, correct? It's important that you saturate the entire root-ball, but I think you got that. Since you mentioned that you live in Scotland what are your plans for it later this year?
You are doing the right thing, but only you can determine when to water next. It does not have to be truly dry, just approaching dryness.
Air layering is a technique that will allow you to induce roots from a chosen portion of the trunk. In your case you can separate the top with new roots already in place. Both portions will then be much more in scale with the diameter of the trunk.
I just gave my ficus alot of water because the composte is really packed so made sure it soaked all the way through. I hope i haven't drowned the thing
I have no experience with this particular species, but in my experience with others, all tropical (by this I mean any that doesn't survive the Zone 6 -- negative single digit °F winter temp and need to be brought indoors) trees and plants develop yellowed leaves and shed some of them during the depth of winter, regardless of how well you are maintaining the growing conditions.
My tea shrublet has dropped all its leaves but are growing tiny new leaves. Downstairs avocado and mango have dropped most of the biggest leaves they grew last summer. Coffee and Jasmine are yellowing and losing about a dozen leaves a week....
Just a thought, although you should still keep an eye out for possible pests like mites, scales, mealybugs, and white flies.
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No water is coming out of the bottom holes so just hope its not water logged
It's probably just the opposite. If the soil is properly saturated water should come out of the holes. You should water to the point of saturation each time you water otherwise you are leaving some part of the root-ball dry.
Not necessarily. It is not uncommon for Ficus to shed leaves when introduced to a new environment. Also, don't disregard the fact that no leaf lasts forever. I keep plants under fluorescent lights out of necessity and, to be honest, by the time spring rolls around most are showing it. Everything really does much better outside during summer.
Don't get too excited yet, slow and steady wins the race.
Yeh very true. Does your strip light cover the whole plant canopy? I have two flourescent strip lights but they don't cover the whole canopy, sha'll i buy a four strip that covers it all? Also are you in the UK? Summer isn't always ideal for ficus outside in the UK.