One your Goldenrod flower are established, they do not require much water. They are drought tolerant and get most of their water from the rain.
I have no idea somebody help me!
16% every week
You need to beat the gym in goldenrod then go to the flower shop right next to it.
Dayliles are somewhat drought tolerant but they flower better with good watering.
water and soil
you need a fateful encounter shaymin, and then talk to the lady in floroma town(pt) or the lady in goldenrod flower shop(hg/ss)
Goldenrod plants typically require about 1 inch of water per week, either from rainfall or supplemental watering. It is important not to overwater, as goldenrods are relatively drought-tolerant once established. It's best to monitor the soil moisture levels and adjust watering accordingly.
Flowers need water because the water provides important nutrients to the plant.
First you need to get the Shaymin from the 11th movie mystery gift event. Then (in Diamond/Pearl) go to the flower shop in Floaroma town. talk to one of the girls and she will give you a Gracidea flower. In HG and SS, you need that 11th movie Shaymin and go to the flower shop in Goldenrod city (northeastern house, near corner)
You should water a big plant for 20-40 secs small plants 10-20 secs
they grow best with preception levels beetween 30 inches -60 inches
You'll get an item to use on it, but if you haven't got it, you aren't at the right point in the game yet. You'll need to travel down to Azalea, then up to Goldenrod, defeat the gym leader, and obtain a water bottle from the flower store. This is the item you need.