I was bought a patio pond plant basket earlier in the year. The delivery was held up and kept hanging on for 3 days (ie given lots of ETAs which kept changing), one plant had dried out. We did plant it up but there's insufficient gravel so had to add more stones. Surprisingly all the plants seemed to revive and started to grow. It was fine at first but soon became unslightly as full of algae and green slime as of course stagnant water. Instructions how to improve the water quality would be a great advantage.The pontederia cordata doesn't seem to like these conditions and any new growth soon dies off. One plus, it's a 'excellent' nursery for mosquitoes, if thats really your burning desire!