1. Introduction & Overview
The AeroGarden Harvest Slim is an indoor hydroponic gardening system designed to grow your favorite plants in water, year-round, without soil. Its slender shape and spacious grow deck allow for simultaneous growth of up to 6 different vegetables, herbs, or flowers, reaching up to 12 inches in height. The system features a high-performance, full-spectrum 20W LED grow light with an automatic on/off timer, mimicking natural sunlight to accelerate plant germination and growth. A touch-sensitive illuminated control panel provides reminders for adding water and plant food, simplifying the gardening experience.
Video: Overview of the AeroGarden Harvest Slim Hydroponic System, demonstrating its features and benefits for growing plants indoors.
2. What's Included
Your AeroGarden Harvest Slim package contains the following components:
- AeroGarden Harvest Slim unit
- 20W LED Grow Light System
- Power Adapter
- One 3 oz. bottle of Liquid Plant Food
- Gourmet Herb Seed Pod Kit (includes Genovese Basil, Curly Parsley, Dill, Thyme, Thai Basil, and Mint)

Image: The AeroGarden Harvest Slim unit displayed with the included seed pods and liquid plant food, ready for setup.
3. Setup Instructions
Follow these steps to quickly set up your AeroGarden Harvest Slim:
- Assemble the Grow Light: Insert the LED grow light system into the base unit. Ensure it is securely connected.
- Add Water: Open the water fill port and add fresh tap water up to the 'Fill To' line indicated on the reservoir. Avoid overfilling.
- Add Plant Food: Refer to the instructions on the liquid plant food bottle for the correct dosage based on the number of pods you are planting. Add the recommended amount directly into the water reservoir.
- Insert Seed Pods: Place the seed pods from your Gourmet Herb Kit into the openings on the grow deck. Ensure each pod is seated firmly.
- Cover with Grow Domes: Place a clear plastic grow dome over each seed pod. This helps create a humid environment for germination. Remove domes once seedlings emerge and leaves touch the dome.
- Plug In & Power On: Connect the power adapter to the unit and plug it into an electrical outlet. The control panel will illuminate.
Video: Detailed unboxing and setup guide for the AeroGarden Harvest Slim, showing assembly and initial planting steps.
4. Operating Instructions
4.1. Control Panel
The touch-sensitive illuminated control panel guides you through the gardening process:
- Add Water Indicator: Illuminates when the water level is low, prompting you to refill the reservoir.
- Add Plant Food Indicator: Illuminates when it's time to add nutrients to your plants. Follow the recommended feeding schedule.
- Light On/Off Button: Manually turn the LED grow light on or off. The automatic timer will resume its cycle after manual override.
4.2. Light Cycle
The 20W full-spectrum LED grow light operates on an automatic timer to provide optimal light for plant growth. The light cycle is pre-programmed for typical plant needs (e.g., 15-17 hours on, 7-9 hours off). You can manually override the light, but the automatic cycle will resume.
4.3. Adjusting Light Height
As your plants grow, adjust the height of the LED grow light to maintain an optimal distance from the plant canopy. The light arm extends up to 12 inches. Keep the light approximately 1-2 inches above the tallest plants for best results.

Image: Close-up of the AeroGarden Harvest Slim's control panel and the adjustable LED grow light, highlighting user-friendly features.
5. Plant Care & Tips
- Pruning: Regularly prune your plants to encourage bushier growth and prevent them from growing too tall and shading other plants.
- Harvesting: Harvest outer leaves first to allow inner leaves to continue growing. For herbs, you can harvest up to 1/3 of the plant at a time.
- Nutrient Schedule: Adhere to the recommended plant food schedule for optimal growth. Over-feeding can harm plants.
- Water Quality: Use fresh tap water. If your tap water is very hard, consider using filtered water.
Video: Short demonstration of growing fresh herbs indoors with the AeroGarden Harvest Slim, highlighting plant growth.
6. Maintenance
- Cleaning the Reservoir: Periodically clean the water reservoir to prevent algae buildup and ensure optimal pump function. Unplug the unit, remove the grow deck, and empty the water. Clean with mild soap and water, rinse thoroughly, and reassemble.
- Replacing Seed Pods: After a full growth cycle, you can replace old seed pods with new ones to continue growing. Ensure the reservoir is clean before starting a new batch.
- Pump Maintenance: Ensure the pump intake is clear of debris to maintain proper water circulation.
7. Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Plants not growing | Insufficient light, incorrect nutrient levels, old seeds. | Adjust light height, check nutrient dosage, replace old seed pods. |
| Algae in water reservoir | Excess light exposure to water, infrequent cleaning. | Ensure grow domes are in place, clean reservoir regularly. |
| Pump not working | Debris in pump intake, pump malfunction. | Clean pump intake, contact customer support if issue persists. |
8. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 12 x 6.5 x 16.75 inches |
| Item Weight | 5.92 pounds |
| Manufacturer | AeroGarden |
| ASIN | B0B23XM72W |
| Item Model Number | 901120-1200 |
| Grow Light | 20W Full-Spectrum LED |
| Plant Capacity | 6 Pods |
| Max Plant Height | 12 inches |
9. Warranty & Support
For warranty information and customer support, please refer to the documentation included with your AeroGarden Harvest Slim or visit the official AeroGarden website. Ensure you have your model number (901120-1200) and purchase details available when contacting support.