npm install node-flower-power

var FlowerPower = require('node-flower-power');

var auth = {
  username: '',
  password: '',
  client_id: '',
  client_secret: '',
};

var api = new FlowerPower(auth, function(err, data) {
  if(err) {
    console.log('Error:', err);
  } else {
    console.log('Logged in');
  }
});

// Method #1
api.getGarden(function(err, plants, sensors) {
  if(err) {
    throw "Error";
  }

  plants.forEach(function(plant) {

    api.getSamples({id: plant.location_identifier}, function(err, samples, events, fertilizer) {

      if(err) {
        throw "Error";
      }

      console.log('samples', samples.length);
      console.log('events', events.length);
      console.log('fertilizer', fertilizer.length);
    });

  });
});

var FlowerPower = require('node-flower-power');

var auth = {
  username: '',
  password: '',
  client_id: '',
  client_secret: '',
};

var api = new FlowerPower(auth);

// Method #2
var getGarden = function() {
  api.getGarden();
};

var getSamples = function(err, plants, sensors) {
  plants.forEach(function(plant) {
    api.getSamples({id: plant.location_identifier});
  });
};

var getSample = function(err, samples, events, fertilizer) {
  console.log('samples', samples.length);
  console.log('events', events.length);
  console.log('fertilizer', fertilizer.length);
};

api.on('authenticated', getGarden);
api.on('have-garden', getSamples);
api.on('have-sample', getSample);