I'm in south central Florida. I have a 20-year-old bunya pine. The other day I found a large cone lying on the ground. At first I thought is was a pineapple the racoons removed from one of my pineapple plants. But as I examined it more closely I could clearly see it wasn't a pineapple.
I've noticed that if a plant will live and grow in a region but not flower or fruit, and there is no obvious nutrient or pest problem, then it is often a day length issue. It could be temperature but it seems plants more often rely on day length than temperature. I would not be surprised if the bunya bunya requires a longer or shorter day, or both sequentially, to initiate the reproductive process.
I guess it's more of a micronutrients deficiency or the soil is just too acidic or both they should try adding some gypsum. One of the trees looked very sick
When i go back i might tell them. Unfortunately their horticulturalist seems to be leaving and they are starting to collect all the dead leaves from the orchards, too. So much about nutrients
Firstly, no Bunyas have fruit. By definition, they are conifers and have male and/or female cones. In their native Australia, perfectly healthy trees can have one gender or both (cones that is). Trees planted near each other in school yards might have 60 years of known history - one gets fenced off each year (particularly every third year) for safety reasons (think: pointed, 7kg cones falling from 25 m up) and the other does not (only produces pollen. Some trees change their "gender balance" over time. Many classic Northern hemisphere pines may produce female cones years before they produce male cones, but other Aracarias produce male cones earlier in life. This phenomena is poorly understood. Soil (well drained basaltic soil at 500-1000 m asl is good - or in Borneo's 'tropical' case, higher elevation), nutrients, rainfall (1m/yr) and tree health is important, but other factors are at play too. Go figure.
I'm in south central Florida. I have a 20-year-old bunya pine. The other day I found a large cone lying on the ground. At first I thought is was a pineapple the racoons removed from one of my pineapple plants. But as I examined it more closely I could clearly see it wasn't a pineapple.
Hope you got many tasty nuts from it. Racoons? In Borneo the civets eat the pineapples🤭
There is a tree close to my house that only grew cones only on the tallest braches
Once a cone broke the top of the roof of someones house
I've noticed that if a plant will live and grow in a region but not flower or fruit, and there is no obvious nutrient or pest problem, then it is often a day length issue. It could be temperature but it seems plants more often rely on day length than temperature. I would not be surprised if the bunya bunya requires a longer or shorter day, or both sequentially, to initiate the reproductive process.
Yes, possible
I guess it's more of a micronutrients deficiency or the soil is just too acidic or both they should try adding some gypsum. One of the trees looked very sick
When i go back i might tell them. Unfortunately their horticulturalist seems to be leaving and they are starting to collect all the dead leaves from the orchards, too. So much about nutrients
That plant might be hunsteinii
Firstly, no Bunyas have fruit. By definition, they are conifers and have male and/or female cones. In their native Australia, perfectly healthy trees can have one gender or both (cones that is). Trees planted near each other in school yards might have 60 years of known history - one gets fenced off each year (particularly every third year) for safety reasons (think: pointed, 7kg cones falling from 25 m up) and the other does not (only produces pollen. Some trees change their "gender balance" over time. Many classic Northern hemisphere pines may produce female cones years before they produce male cones, but other Aracarias produce male cones earlier in life. This phenomena is poorly understood. Soil (well drained basaltic soil at 500-1000 m asl is good - or in Borneo's 'tropical' case, higher elevation), nutrients, rainfall (1m/yr) and tree health is important, but other factors are at play too. Go figure.