Holly
Quercus ilex
Fagaceae · broadleaf · introduced
Quick Facts
Height
82 ft
Spread
65 ft
Growth Rate
Slow
Light
Full Sun to Shade
Soil
Moist
Water
Moderate
Hardiness
Zone Zones 7a–8b
Bloom Time
April to May
Origin
southern Europe and northwest Africa (Mediterranean
Diseases (17)
Several factors Red Leaf Spotting
Phytophthora leaf & twig blight
Green algae Green Algae
Many commercial Boron Deficiency
Cytospora canker Cytospora Canker
Microstroma album Frosty Mildew
Ganoderma applanatum Ganoderma Root and Butt Rot
Pseudoinonotus dryadeus Inonotus Root and Butt Rot
Taphrina spp. Leaf Blister
Phoradendron villosum Mistletoe (a True Mistletoe)
Neonectria ditissima Nectria Canker
Podosphaera aphanis var. aphanis Powdery Mildew
Inonotus dryophilus White Pocket Rot (Piped Rot)
Various species including Colletotrichum acutatum, C Anthracnose
Armillaria ostoyae Armillaria Root Rot
abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch
Phytophthora ramorum Sudden Oak Death
Pests (21)
Nuculaspis californica Lecanium scale
Pulvinaria floccifera Cottony camellia scale
Brown soft scale
Orange tortrix
Holly leafminer
Rhopobota naevana Holly bud moth
Mistletoe
California Gallfly
Jumping Oak Gall
Leaf galls
Oak leaf phylloxera
Oak Ribbed Casemaker
Oak Treehoppers
Pit scale
Stem Gall
Looper
Carpenterworm
Oak gall wasp
Oak skeletonizer
Rose leafhopper
Leaf and twig gall