The seedlings have been in the propagator for 2 weeks and have established well into their propagation cubes. Now they are ready for planting into larger rockwool blocks, jiffy coco coir blocks or pots.
I usually decide to transplant the seedlings when the first 'true' leaves are through (after the first 2 round dicotyledons) and/or the propagation cube has roots growing out of it. Notice how the roots growing out of this rockwool cube are very white and healthy.
The plants final hydroponic system usually determines what they are transplanted into. I mainly use 4 inch rockwool blocks which are the most flexible choice as they are suited to nearly all systems. The picture shows the transplant blocks prior to soaking.
measures 5.5 and EC of 1.5.
The pH will rise to around 5.8-6 a few hours after the rockwool is added. Some growers will use a lower Nutrient strength (EC) whentransplanting seedlings but I find and EC of 1.5 stimulates good growth with no negative effects.
The Jiffy coco coir blocks allready contain nutrient so only need to be soaked in water although a root stimulator can be used. After soaking squeeze off the excess solution that the coir will hold.
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