It is right that Iron helps greenup but it's the Nirogen that makes the lawn green.

Evergreen will only work if the conditions are right. It will not work if the weather is to cold or to dry. the sprinkle with the hose at the time of application will not be enough to ensure the evergreen works.

I would advise to be sure that the evergreen is just a lawn fertilizer as weed and feed or 3in1 products are far less successful.

Use a lawn feed and then use a weed killer if required and only when the lawn
is healthy.

Lawn sand is a good product but for use on moss rather than feeding the lawn.