A

Black Spot

Black Spot (Plant Disease: Caused by Diplocarpon rosae)Classification:Kingdom: FungiPhylum: AscomycotaClass: LeotiomycetesOrder: HelotialesFamily: DermateaceaeGenus: DiplocarponSpecies: Diplocarpon rosaeDescription:Black spot is a fungal disease that primarily affects...

Aquatic

Aquatic (adj.)In botanical terminology, aquatic refers to plants that grow in or are adapted to water environments, including freshwater, brackish, and marine habitats. These...

Appressed

Appressed (adj.)In botanical terminology, appressed describes plant structures—such as leaves, hairs (trichomes), or scales—that lie flat against the surface of another organ, rather than...

Apple Sawfly

Apple Sawfly (Hoplocampa testudinea)OverviewThe apple sawfly (Hoplocampa testudinea) is a small, wasp-like insect that primarily affects apple (Malus domestica) trees. It is a significant...

Apple Scab

Apple Scab (Venturia inaequalis)OverviewApple scab is a fungal disease caused by Venturia inaequalis, affecting apple (Malus domestica) and crabapple (Malus spp.) trees. It is...

Apple Powdery Mildew

Apple Powdery Mildew (Podosphaera leucotricha)Taxonomy:Kingdom: FungiPhylum: AscomycotaClass: LeotiomycetesOrder: ErysiphalesFamily: ErysiphaceaeGenus: PodosphaeraSpecies: P. leucotrichaDescription:Apple powdery mildew (Podosphaera leucotricha) is a fungal pathogen that affects apple...

Apple Blossom Weevil

Apple Blossom Weevil (Anthonomus pomorum)Taxonomy:Kingdom: AnimaliaPhylum: ArthropodaClass: InsectaOrder: ColeopteraFamily: CurculionidaeGenus: AnthonomusSpecies: A. pomorumDescription:The Apple Blossom Weevil (Anthonomus pomorum) is a small, reddish-brown beetle belonging...

Aphis

AphisDefinition:The term Aphis refers to a genus of small sap-sucking insects belonging to the family Aphididae. Commonly known as aphids, these soft-bodied insects are...

Apiculate

ApiculateDefinition:The term apiculate (derived from the Latin apiculus, meaning "small point") describes a plant structure that ends in a short, pointed tip, often slightly...

1 2 3 4 5 Page 1 of 5

DALL·E 2025 01 29 20.21.49 A detailed illustration of a botanist carefully making an F1 hybrid. The botanist wearing a lab coat and gloves is seen using a fine brush to transf

Understandinggardening

Increase your knowledge of this fascinating subject

Learn

Keep up with the news

Hardiness ratings

RHS Hardiness Ratings	USDA Plant Hardiness Zones	Approximate Temperature Range (°C)
H1a H1b H1c	13 12 11	>15°C 10 to 15°C 5 to 10°C
H2	10b	1 to 5°C
H3	9b to 10a	-5 to 1°C
H4	8b to 9a	-10 to -5°C
H5	7b to 8a	-15 to -10°C
H6	6b and 7a	-20 to -15°C
H7	6a	Below -20°C

A

Understandinggardening

Keep up with the news

Latest News

Most Popular

Hardiness ratings