3/28/14---setup tank + raft--no fish
about (20) 2" net cups w/hydroClay (Hydroton) w/ a split cottonball to hold seeds abt 2/ea of broccoli + mesclun w/ (2) 3" pots for squash. Tank is a 20gal tote, 40gal airpump & round bubbler---no fish yet.
3/30--2 little broc's.
4/5--(4) brocs--no sign on the others yet, including mesclun
Most vegetables do best sprouted in tiny starter pots or flats prior to transplanting to the planting bed. This is especially true for hydroponics, because you cannot plant little bitty seeds directly in place into the coarse hydro planting media. Hydroponic seeds get lost, wash away with the nutrient solution, or they fail to get enough moisture to sprout.
So hydroponics seeds need a protected little nursery in order to sprout from a safely rooted base.
With hydroponics, it is best to start your seeds in cubes of inorganic material, not soil. When they are ready, you just place the entire plug into the hydroponic media bed. The roots grow right on through.
We recommend that you choose one of these three starter plugs, which can be ordered from any hydroponics supplier or use our links:
Rapid Rooter Starter Plugs (see above)
"Perfect Starts" 36-pack for larger seedlings, or 100-pack for herbs & lettuces
Grodan Rockwool starter cubes (below)
Air Pump---Monster Gardens =Active Aqua Commercial Air Pump=
45 Liter/min = $40 Use 1-2 L/min for ea Liter of liquid--John Kohler@ 20:00
4/6--one more broc showing--added fert solution---had been straight water.
2oz wormTea+1oz Kelp->>murky water.
Other good hydroponic seed plugs:
"Oasis Horticubes" are small 1" x 1" cubes suitable for starting lettuce or herbs.
You will want to create a little "seed nursery" in a warm, brightly lit spot. A bright kitchen window or warm space under an inexpensive fluorescent gro-light would be good. But you don't want to bake them in direct sunlight or hot lamps. Seeds will not sprout unless it's at least 65 degrees (70-80 is ideal).
***You MUST provide bright light close to the flat, or the babies will grow long and spindly and flop over. We're talking only 1-2" above the plants! Don't skip past this bit of advice! Bright fluorescent lighting creates thick, short, stocky, healthy seedlings.
If you want to get fancy and indulge your new hydro habit, they sell little domed starter systems and warming "seed mats". Convenient and fun, but not absolutely necessary; a tupperware tray would suffice. They are not very expensive, here they are if you want to investigate: Domed propagation trays & warming seedling mats.
TIP
*Don't use peat pellets, jiffy pots or potting soilin a hydroponic system, as they break down and clog the pump.
Planting Hydroponic seeds
Moisten the starter cubes with water.
Insert seeds into the cube holes. For tomato, peppers, cukes, eggplants, basil, broccoli and cabbage, use 2 seeds per cube; for herbs, 6-8 seeds per cube. Start a couple more cubes of each type of crop than you intend to keep, so you can select the best.
Place in the nursery tray and keep warm (70-80 degrees). Water every day or two by adding "seedling solution" to the drain pan, not the cubes. [Use 1/2 strength nutrient solution mix. If you use GH Flora Nutrients, mix up a batch of "seedling solution" in a one-gallon milk jug; using 1/4 tsp. of each of the three solution mixes (micro, gro and bloom) to one gallon of water.]
Voila! They will start sprouting in a couple days. Once up and running, cut off the extras and leave only the one best seedling in each cube. (Thin out the weaker, spindly,slow-growers).
When to transplant? When the plant is 2-3 inches tall, with 4 leaves, and roots start to show thru the sides of the cubes. This usually takes 1-3 weeks. Peppers and tomatoes can take up to 4 weeks.
Once your babies are ready to graduate to the big hydroponic unit, it helps to gradually get them used to the new climate. "Harden them off" if they are going outside or to a greenhouse, to stronger light and cooler temps. If you want to "keep it simple", just skip this step, your plants should still survive.
But if you are transplanting to an indoor hydro setup, you must break them in to the warmer temp and new intense light system or you will burn them up.
Start by keeping the lamps way up high at first, then every few days you can lower it 'til you are about 18-24" above the crops. If you start the tender babies directly under the hot lights, they will shrivel up and die. I know cause I've done it.
Transplant the cubes directly into the hydro unit. You do not remove from the starter plugs. Just dig a little hole in the hydro medium and plug in the cube. It's great, you don't disturb the roots, they grow right on through.
When you first transplant to the hydro unit, top water them daily the first week with nutrient solution. This guarantees they won't dry out before the roots get a chance to reach down toward the juice. A turkey baster works great for this.