Indoors, these plants need quite bright light and humidity. If your find that your plant is not thriving, in all likelihood it is likely not receiving sufficient light or humidity. In Florida we know all about humidity, but we strive to keep it out of our homes, so how do you make it humid for your houseplants?
Overwatering is not the answer; Norfolk Island pines don't appreciate being too wet. Instead, fill a saucer with water and rocks or gravel, then place the potted plant on top making sure the pot is not sitting directly in water. There you have it—you've created your own little high-humidity microclimate.
The tallest known tree of this species is Other notable trees are at Tedeschi Winery in Maui, Hawaii cm dbh and The year-old tree mentioned above is the oldest that I have read of. I would expect that older trees formerly occurred, but it is likely that all trees now living postdate the settlement of Norfolk Island. It proved a useful timber for other purposes however" Norfolk Island Botanical Gardens home page, accessed , now defunct.
This is the Araucaria most widely used as an ornamental; it is even a moderately popular Christmas tree. It is very widely planted in New Zealand, where it was native as recently as the Pleistocene Graeme Platt, pers.
Female cones are produced on trees older than 15 years and male cones on trees older than 40 years. Prolific seed fall occurs every [years] and the seeds are a popular food source for the Green Parrot and introduced rats" Norfolk Island Botanical Gardens home page, accessed , now defunct. National Register of Big Trees. Tree details.
See, in the wild Norfolk Island pine wants to grow 80 feet tall. It still wants to do that inside your house. This poses difficulties for folks who don't have foot ceilings.
Thus, Norfolk Island pine eventually grows too tall for most houses. That's when people turn to Grumpy, seeking solutions. The first solution is obvious. Throw it away and start over with a small one. But that might strike you as heartless, as the population of homeless Norfolk Island pines continues to swell and strain local resources. The second solution is just as obvious. Reduce it to a more manageable size by pruning.
Nevertheless, individual site factors play an important role so you were right in having your tree inspected. If you have branches removed by a qualified arborist you are unlikely to risk infection by pathogens, though tree loppers may prune the branches incorrectly and permit fungal entry at wound sites. But, why do you want it thinned out? Is it to reduce windage? Because that would largely be offset in a tree with this particular growth form by reduced strength as the branches absorb impact from the wind strengthening the trunk.
I thought trimming it would reduce the weight at the top of the tree and therefore cause less swaying and so less prone to falling. But your answer explains why the tree would be weakened if I trim it. So from the sound of it I am best off to cut the top outright with a certified arborist who would ensure it is cut properly and no fungal entry is possible?
I hate the idea of making it ugly though. I know I can remove the tree as its so close to my house but I love its look shade, and home to large birds during nesting. Hi Martin. It depends where you are located.
I picked up a half-empty cone yesterday. Every fourth or fifth year there is very low cone production. Regards, David. Perhaps I am very intusive, but is it possible to get 30 seeds from this tree? You make me happy. Thank you very much for your help.
I cannot find any information online on the root system of my norfolk pine tree. It is now extremely tall and the trunk is now 3. I am confident if I try to build a hole for a pool a metre and a half from the trunk it will mean some of the root system will be destroyed.
People tell me it has a deep tap root — but I cannot find confirmation of this anywhere. It is still growing. Are you able to assist me with information re the roots please?
Hi Liz. Do you mean its circumference is 3. That would give you a diametre of just under 1 metre. The structural root zone SRZ of the tree is calculated using a fairly complex formula using the diameter of the tree just above the roots.
Supposing it was 1m, your structural root zone would be 3. No arborist should suggest it safe for you to excavate that close to the tree without compromising the structural integrity of the pine. If they have, please phone me immediately on Thanks, David. Putting a pool that close to any established medium to large tree will result in sinificant damage to the tree, and potentially in future the pool.
Is continuued root growth going to be a problem. The tree is about 9 metres tall. Cheers, Jill. Hi Jill. During dry weather roots contract leading to soil subsidence. How much of a problem it will be depends on your soil type: re-active clay being the worst. The tree is, unfortunately, in the wrong place. When we moved in ten years ago it was established and in that time it has become bigger we can really see the difference when we look at old photos as you can see the change in the size of the trunk.
I suggest a generous layer of woodchip and planting Bromeliads. Nothing much else will grow successfully. David, Could you please explain why local councils have the burning desire to plant Norfolk Island Pines on the coastline. They are not native to Australia and do block water views of residents. Councils seem to be adamant that this is the only suitable tree for the coastal strip of Aus.
Surely there are alternative plantings that grow to a lower height and would not block views. Would appreciate your comments. Hi Terry. Yes, there are alternatives such as Pandanus spp. I often disagree with LGAs choice of species myself and I sympathise with your problem. Norfolk Island pines are a threatened species, vulnerable in their native environment.
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