What is the difference between say one fertilizer that has N-8 P-4 K-8 ratio
and another like the tomato plant fertilizer I bought with an N-20 P-18 K-20
Why the difference and why would I want to use the former rather than the latter?
You are feeding them 20-18-20 every two weeks? You will grow them to death! That is very concentrated. Especially being so high on the nitrogen, you are likely to get huge, leafy plants that don't make any fruit (i.e. peppers). The peas and beans are nitrogen fixers, they take their own nitrogen from the air and don't need any added. In fact they add N to the soil, which is helpful for other plants grown there later (especially if you cut the plants off at ground level and leave the roots).veggielover2012 wrote:I've got a decent understanding of the fertilizer basics.
Ok I am growing at this moment some peppers, some sugar snap peas and some garden beans in containers. The one thing I am fuzzy on though is why I would want to use a veggie/plant fertilizer which is dry with a 4,8,4 ratio over the liquid fertilizer with an 20,18,20 ratio? I know both are synthetic, but the box for both says to feed the plants every two weeks.
So basically I have two fertilizers, one which seemingly supplies the plants with a much lower ratio of nutrients and minerals, while the other is much higher? Is there a reason to use one or the other? I have both but have been using the 20,18,20.
I guess I am just not understanding the reasoning of the different ratio's of fertilizers over other ones.