Native to Europe and parts of Asia, also found in North America.
Grows to five feet, has white flowers like in picture.
To care for Valerian plant it in soil with a strong acid pH of 4.5-5.
It needs 7 hours of sunlight as a minimum and should be kept away from cats as they are attracted to it.
Valerian has sedative and calming properties and is used in sleeping and calming potions primarily. It can also be used in a forgetfulness potion to induce drowsiness.
Gillyweed
Rare herb, native to Mediterranean.
Slimy plant, grey green grows in bunches. 5 to 7cm in height.
To care for Gillyweed plant moderately alkaline soil, 7.9-8.4 pH. A large quantity of water and low sunlight is best.
Gillyweed is used to enable a person to breathe underwater, consumption causes gills to form on the persons neck and toes and fingers to become webbed.
Gillyweed is also used in a popular drink called gillywater which uses the quality of the plant to give a satisfied, nourished feeling.
Knotgrass
Knotgrass is a herb that can grow to a huge range of sizes, from 5cm to 4m.
Knotgrass is symbolic for joining people together and is often used at weddings.
It has some medicinal properties but is mostly used in the polyjuice potion.
To care for knotgrass plant it in a neutral pH soil, give it a lot of water and sunlight relative to how fast you want it to grow.
Dittany
Naturally native to hillsides in Crete, hard to reach. Is cultivated in greenhouses.
Dittany grows 20-30 cm in height. It has lovely pink flowers.
To care for Dittany plant seeds in neutral soil, always make sure the plant and soil is dry when you water it. You shouldn't give it too much water but if you do let it dry out. The climate should also be carefully controlled to stay at 13' C.
Dittany is a powerful healing herb, it can heal many issues and prevent scarring. It is also an ingredient in many love potions and is known to muggles for that purpose.