Soil/Composting: 

Soil Testing

Soil Testing Form for Lawns, Gardens, & Landscapes 

Texas A&M AgriLife Publications

Lawns: 

Aggie Turf

Soil Testing 

Soil Testing Form for Lawns, Gardens, & Landscapes

Texas A&M AgriLife Publications 

Landscapes:

AHS Plant Heat Zone Map 

USDA Plant Hardiness Zone Map

Aggie Horticulture

Tree Planting and Care

Texas A&M AgriLife Publications 

Native Plants:

Native Plant Society of Texas

Houston Area Native Plant List

Native Plants for Pollinators and Beneficial Insects – Southeast Region by Xerces Society

Native Plants for Pollinators and Beneficial Insects – Southern Plains Region by Xerces Society

Poisonous Plants: 

Earth-Kind Poisonous Plants Resources – Texas A&M Horticulture 

Poisonous Plants – ASPCA 

Poisonous Plants in the Landscape – University of Georgia Extension 

Plants Poisonous to Livestock and other Animals – Cornell University 

Poison Control – National Poison Control Center 

Gardens/Orchards: 

Texas A&M AgriLife Publications 

Plant Problems: 

Texas A&M AgriLife Publications 

National Pesticide Information Center 

Insects and Mite Pests:

Fire Ants

Bug Guide by Iowa State Univ.

Plant Diseases:

Texas Plant Disease Diagnostic Clinic 

Rose Rosette Disease

Texas A&M Tomato Problem Solver (includes Insects)

Vegetable Disease Factsheets & Articles by Cornell Univ.

Weeds:

Weeds Identification Gallery by Univ. of Calif.

Invasive Plants, Insects, Animals, and Disease:

Texas Invasives by Ecoregions

Invasive Plants by the Native Plant Society of Texas

New Invaders of the Southeast by USDA and Univ. of Georgia

Bees, Butterflies, and Other Pollinators:

Plants for Pollinators by Xerces Society

Monarch Watch

Birds and Other Wildlife:

Merlin Bird ID app (Free!)

Wild Birds Unlimited birding resources