Fertiliser NPK ratios

It looks awfully high phosphate @pete . For goodness sake keep it away from the proteas!

 

Yes I thought of that, it seems strange how much phosphate it contains.
If you look at a site that deals in Plumerias, at a very high price, it seems to be the ratio they recommend.

 

That's strange. I know high phosphate used to be pushed for encouraging flowering, but I've since read that it's not necessary. The fertiliser I acquired when we cleared out a "farm" in a rental property is pretty balanced - and I'm sure the suppliers for such businesses provide the optimum stuff! (15-19-38 so higher K)!
Interestingly the fertiliser haul also included smaller quantities of liquid fertiliser rated 0-0-0 but with loads of trace elements.

 

Well yes,the way I understood it was phosphate was the main one for root growth and potash for flowers.

The fertiliser on the plumeria site is apparently American and I thought for a while that maybe they quote the different elements in a different order, but as far as I can work out, not.

 

It will vary depending upon what level is naturally available, soils which are extremely acid or alkaline or where hot dry conditions are the norm will not encourage plants to absorb phosphate, needing severe amendment.

 

But I'm growing in pots.
Admittedly mostly under glass, so probably considered hot at times.

 

Yes @pete you're right I got it reversed. It's because protaceae have adapted to poor conditions as @infradig discusses that they can't take high P levels. However I don't see why plumeria would need such levels. The one I grew from seed flowered with no special treatment - and since they are so leafy I'd have thought they need balanced feed.

 

I think there is possibly a certain amount of luck involved when growing them from seed, early flowering may be something some seed grown plants do.

I belive there are at least one or two different species probably more.

 

Well I've got some now to try,they even personalised the package for me.

 

"1gm/litre!"
Careful you don't spill it, might be worth getting a syringe(no sharp !)from the vet ?

 

I've weighed out 5 grams and its pretty much a level spoonful of the spoons that come with Chempak.
Got a 5 litre can.