Each plant has it's own unique requirements and qualities so no two are the same so are individuals. Needs such as food, sunlight, watering, habitats and life span are individual to each plant and will be key in taking care of it when planting, and rerooting. 

When planting a plant consider: What soil is best? How deep to plant a seed? How much water? How much sunlight?

Repotting a plant other then giving the plant a new fresh pot could also mean in some changes in the care of it. Some plants at a later stage of their life span have a change in their needs such as space, diet, sunlight, water and the Herbologist needs to cater to these new needs.*

Should we take foreign plants from their natural environment? Many plants do change and adapt to their new home but it can disrupt the balance of the plants natural life cycle making it longer or shorter. Medical and experimental use  of the plant can drastically shorten the life of a plant.**

Dreamless Sleep: starpuffs, moonstone***

Draught of Living Death: wormwood, powdered root of asphodel 

Forgetfulness Potion: 2 drops of Lethe River Water, 4 mistletoe berries, 2 valerian springs, 2 measures of standard ingredient.

Other plants in sleep potions: mistletoe berries. wolfsbane/monkshood/aconite, valerian springs, leaping toadstool, knotgrass, peppermint, root of aconite, poppy heads, shrivelfigs, rose thorns, rose oil.

Reasons to add plants to potions: smell, freshness, natural qualities. 

Reasons to add certain plants to medical potions: temperament, toixcity, other properties of the plant. 

Starpuff: Alive had hypnotic quality sparkling pettals and shimmering leaves. Gives the Dreamless Sleep potion and characteristic of allowing the user a dreamless sleep by switching off the ability to think. 

Mistletoe berries: causes hallucinations distracts causes forgetfulness. 

Valerian springs: sedative quality put the mind to sleep causes forgetfulness. 

Asphodel (aka Royal Staff): long slender leaves. member of the lily family. found world wide. root powder used in Draught of the Living Death and Wiggenweld Potion. Ancient greeks associated it with death and the underworld and meadow in Elysium. Believed favorite food of the dead. 

Fluxweed: mustard family. healing qualities. picked at midnight to use for Polyjuice Potion (sixteen scruples). 

Lovage: similar to celery. used for cooking. used for medicine for centuries. "most efficacious in the inflaming of the brain". found in Confusing and Befuddlement Draughts.

Motherwort (a.k.a Throw-wort, Lion's Ear and Lion's Tai): herbacious perennial plant of the mint family. healing properties. used to heal mad dog bites. 

Nettle (a.k.a. stinging nettle): stinging hair. used in potion making e.g. Boil-Cure Potion (fresh), or Herbicide Potion (dried). used in beverages e.g. nettle wine, nettle tea, soup. rumoured to give glossy hair. included in the Nine Herbs Charm of the Anglo-Saxons

Nux Myristica: magical plant used in potion making. known as nutmeg used for cooking as a spice and therapeutic uses. sometimes in small dosage used for medical purposes. 

Peppermint: used by both wizards and muggles to flavour sweets e.g. Bertie Bott's Every Flavoured Beans. can be used in potions such as Elixir to Induce Euphoria as discovered by Professor Severus Snape to get rid of the potions side effects.

Silverweed (a.k.a. groosewort): belongs to the rose family. yellow in colour. highly respectable medical plant in medieval times used for abdominal pain and open sores. 

Snakeweed: magical plant used for potions and beverages such a snakeweed tea. part of the Polygonum genus. commonly known as Bistort used to treat ulcerative sores and stomach ailments. found in springtime pudding in Northern England. 

*Flesh-Eating Plants usually double their intake, while Gaviat Roots will eat a third of the servings of grass which it used to (two thirds less than before). 

** 3000-5000 years natural e.g. trees, cacti or guapo herbs. 

*** broken piece of dragon egg