Some cultivars of cannabis will produce trichome heads that survive the hash washing more in tact.  Many are sandy to the touch, instead of greasy.  Firm resin heads will retain their shape and hold the oil with the terps and cannabinoids inside. These cultivars are highly sought after and bred into for their resin qualities.
- Skunk #1
- Strawnanna
- GMO
- Tangie crosses
- Afghan strains
- Grease bucket
- Double berger
- Thc bomb
- Sleestack
- Mimosa
- Sour Diesel
- Lemon Peel
- Renee
- OG Pie Breath
- Royal Pie
- Cookies and Cream
- Peanut Butter Breath
- White Walker
- Wedding Cake
- Motor Breath
- Key Lime Pie
- Grease Monkey
- Gorilla Glue
- Grape Pie
- Kimbo Kush