| Business | Phone |
| Cooperative Ext Svc-Recycling Route 355 & Shady Grove Rdamp;, Derwood 20855 | (301) 590-0046 |
| Cooperative Ext-Garden & Lawn 18410 Muncaster Rd, Derwood 20855 | (301) 590-9650 |
| Montgomery Soil Cnsrvtn 18410 Muncaster Rd, Derwood 20855 | (301) 590-2855 |
| Montgomery Cooperative Ext Svc 18410 Muncaster Rd, Derwood 20855 | (301) 590-9638 |