My First Airlift Window Farm and Limp Lettuce Seedlings
3:53 pm in Uncategorized by Tony Reyes
Pictures, video, and material list are below. I just transferred eight lettuce seedlings to my first hydroponic window farm. They are looking a bit limp though. The leaves seem healthy but the central stem seems a bit limp. They were in this state before the transfer. I started them in General Hydroponics rapid rooter cylinders for two weeks before transferring them. Do they look normal for this age in the pictures below? I focused on minimizing the amount of plastic in the system and used copper piping and glazed claypots where practical. A youtube video describing my windowfarm can be seen here: http://youtu.be/9mVqVwzEVJ8 (video was still uploading when I posted this so check back in a bit if not yet ready.) I’m using General Hydroponics Flora 3 part nutrients in a 1-1-1 tsp per gallon ratio for general vegetative growth. During the seedling stage it was a less concentrated mix with 1/8tsp per gallon instead of 1tsp per gallon of each nutrient.
The materials for the build are listed below including prices with tax (a couple of scrap items I missed in the list are a 4′ piece of 3/4″ EMT electrical conduit and 8′ of yellow Nylon string):
| Qty | Unit | Description | Supplier | $/unit | Price | Price w/tax | |
| 1 | pack | Lactuca Sativa Lettuce Leaf Salad Bowl Blend | Enchanted Gardens | $ 1.89 | $ 1.89 | $ 2.03 | |
| 8 | ea | 4″ Drain Pipe Drop In Grate Styrene | Home Depot | $ 1.73 | $ 13.84 | $ 14.98 | |
| 8 | ea | 4.5″ Terracotta Glazed Flower Pots | Home Depot | $ 2.28 | $ 18.24 | $ 19.74 | |
| 1 | ea | GE lamp timer 24hr 30min basic timer | Home Depot | $ 4.88 | $ 4.88 | $ 5.28 | |
| 1 | ea | 10′ roll of copper tubing, 1/4″ OD | Lowe’s | $ 8.87 | $ 8.87 | $ 9.60 | |
| 1 | ea | nylon tees 1/4″ ID | Lowe’s | $ 2.03 | $ 2.03 | $ 2.20 | |
| 1 | ft | 3/16″ ID Vinyl Tubing | Lowe’s | $ 0.20 | $ 0.20 | $ 0.22 | |
| 0.133 | 30 pack | 10-24 1.5″ machine screws | Lowe’s | $ 5.58 | $ 0.74 | $ 0.81 | |
| 0.2 | 10 pack | 2 1/16″ screw hook | Lowe’s | $ 6.99 | $ 1.40 | $ 1.51 | |
| 1 | ea | 3 watt Pump Eco Air 1 Outlet | Dr. Green | $ 10.49 | $ 10.49 | $ 11.28 | |
| 8 | ea | 3.75″ Net Pot | Dr. Green | $ 0.56 | $ 4.48 | $ 4.82 | |
| 0.1 | ea | PH Meter Hna98107 | Dr. Green | $ 57.95 | $ 5.80 | $ 6.23 | |
| 10 | ft | 3/16″ Inner Dia Black Vinyl tubing | Dr. Green | $ 0.30 | $ 3.00 | $ 3.23 | |
| 6 | ft | 1/2″ Inner Dia Black Vinyl tubing | Dr. Green | $ 0.33 | $ 1.98 | $ 2.13 | |
| 1 | ea | 7.01 PH calibration solution | Dr. Green | $ 1.32 | $ 1.32 | $ 1.42 | |
| 1 | ea | 4.01 PH calibration solution | Dr. Green | $ 1.32 | $ 1.32 | $ 1.42 | |
| 1 | qrt | Flora Grow Nutrients | Dr. Green | $ 12.50 | $ 12.50 | $ 13.45 | |
| 1 | qrt | Flora Micro Nutrients | Dr. Green | $ 15.94 | $ 15.94 | $ 17.15 | |
| 1 | qrt | Flora Bloom Nutrients | Dr. Green | $ 12.50 | $ 12.50 | $ 13.45 | |
| 0.16 | 50 pack | General Hydroponics Rapid Rooter Seed Starter | Dr. Green | $ 16.70 | $ 2.67 | $ 2.87 | |
| 0.2 | 10L pack | Hydroton Clay | Dr. Green | $ 10.99 | $ 2.20 | $ 2.36 | |
| 1 | ea | 10% one time Dr Green Discount | Dr. Green | $ (14.82) | |||
| 1 | ea | PETCO Anti-siphon valve | Petco | $ 2.29 | $ 2.29 | $ - | |
| 1 | ea | PETCO brass T valve | Petco | $ 1.69 | $ 1.69 | $ - | |
| 0.571 | 14 pack | Polyethylene Funnels, 16oz 5.25 inch top 0.5″ bottom | Food Service Warehouse | $ 21.85 | $ 12.49 | $ 12.49 | |
| 1 | ea | Glass Vase | Lying around at home | $ - | $ - | $ - | |
| Total | $ 133.84 |






The plants will get a minimal amount of shock from the transfer to the windowfarm, but it could also be not enough water. You may have to direct water towards the plant until the roots grow.
This can happen in as little as 4 hours without water in the windowfarm.
I ran into this problem when growing in my hydroponic growbed. They need some airflow, Put an oscillating fan in the room somewhere, it will strengthen the stems.
It appears the the limp leaves were from transfer shock. The plants are growing well now and are much stronger. I’m considering adding a grow light as they spruce up during the day and get a bit limp at night when they’ve been without light for a while. One plant died and I am experimenting with seeding directly in the window farm. The seed did sprout and the seedling seems to be doing well so far. Seeding directly in the window farm if viable would eliminate the transfer shock.