Well if you don't care about N really at all you can get a x:2:1 with Potassium Nitrate and Monopotassium Phosphate. 1 : 3.76 : 7.51 would be the actual ratio NPK ratio. That keeps your 1:2 PK ratio with a low N (lower than you asked about). To get that ratio in a liquid form it would be 354g of KNO3 mixed with 793g of MPP in 1 liter of distilled water (note that it will be less water actually - fill a container 50% full, mix in ingredients, fill up to 1 liter mark). You'll have to look into the compatibility of KNO3 and MPP - I haven't tried mixing them before. This will almost certainly be your cheapest solution if you can get KNO3 where you are - it's an oxidizer and is sometimes strictly controlled. Cost per liter where I am comes to about $3. I would stay away from high concentrations of potassium chloride... you tend to get way more Cl than you want in those formulations. If you want to get into mixing your own fertilizers then HydroBuddy is very helpful. Most useful for liquid fertilizers. I suggest you check it out.

Hi Jen, I know some websites that are very good. I also have all the Tatty Teddy charts and would be willing to send them to you. The websites I use are: http://baudria.multiply.com/ http://kep.tar.hu/xszemestopik/50139555#2 http://show.7ya.ru/private.aspx?login=Casablanca&RubrID=56988 Please email if you would like any charts. Jen6uk

As I have tried to make clear previously, I don't dispute that high P levels are relatively more toxic to Proteaceae than to other plant families, but I do believe that many rainforest grevilleas are less susceptible than WA species. Again its a relative thing, and I have certainly found one that isn't. A landscape supplier dumped a truckload of potting mix in my garden, close to some trees but about 6 metres from a G. baileyana. Some months afterwards it died, and on digging up the mix it was full of proteoid roots! Retrospectively, I have realised I have had a much higher proteaceae failure rate since using that mix, so I must find out what's in it. The seller told me it was fine for natives - you'd think that at my age I'd know better than to trust a salesperson, but my problem is I can remember back when most of them were trustworthy. Tony

......needs to be amended to remove the cross-post to the New to Gardening FAQ. Posting to any FAQ forum prevents any responses from showing up. They are reference forums, not discussion forums, which is why they are separated from all the other gardening forums.