Best Fertilizer for a Low Tech Planted Tank?

[ColemAnthony1]

I just purchased some Anubias, Java Fern, Elodia, and Sagittaria subulta. I have some Seachem Flourish, but is this enough to keep my plants healthy? If not what fertilizer(s) should I get?

 

[Caliban07]

I just purchased some Anubias, Java Fern, Elodia, and Sagittaria subulta. I have some Seachem Flourish, but is this enough to keep my plants healthy? If not what fertilizer(s) should I get?

Fertilisers need to contain nitrogen, potassium, phosphates, magnesium and trace elements like iron, zinc, boron, copper and manganese.

Does Flourish contain all those? Sometimes (with a capital S) there is enough nitrogen and phosphates available to the plants via breakdown of fish waste/food etc.