Kentia can tolerate neglect. Do not fuss over your kentia, either in pots or planted in the ground. Follow basic planting advice and take care not to overwater. Both over and under watering your palm tree will show up on the leaves in the same way. They will look burnt.
Let the rootball always dry out between waterings.
Kentia are prone to rotting out if they are overwatered. The first sign of rot in a palm tree most people notice is that the centre spear will go brown, whereas much of the foliage will still look green. The centre will come out cleanly if jerked directly upward and have a sweet rotten smell to the base of the stem.