Week 0 - Germination
I consider this a long week 0, more then 7 days, as I don't start counting the start of a week until the seedling pops out of the medium (rock wool).
This is also a week where changes are happening quickly and I need to act on them fast. If I can get the seedlings past week 0 they have a good chance of survival.
- Tuesday, October 14th - Germinated seeds
- placed 6 seeds into wet paper towl, zip lock bag and left them on top of my PVR for two days.
- 2 White Widow
- 2 Sweet Purple
- 2 Jack Herer
- Submerged 6x1" rock wool cubes in 5.8 PH balanced tap water for 24hrs.
- Wednesday, October 15th - Preheated rock wool
- Removed submerged rock wool and shook out most of the water,
- Placed rock wool in a container and put it on top of the PVR. (Start warming them up)
- Placed saran wrap on top of the container - Retain the moisture.
- Thursday, October 16th, 5 seeds germinated, nice roots, ~ 1/2" long - Only 1 White Widow didn't fully germinate.
- Placed each of the 5 germinated seeds in a 1" rock wool cube.
- Opened up the existing hole in the rock wool and made it a little deeper.
- Roots were long so went in facing down.
- Covered the hole in top with a very thin layer of rock wool.
- Kept the rock wool on top of the PVR, container covered with saran wrap.
- Saturday Morning, October 18th - All seeds popped through top of rock wool.
- Saturday Evening, October 18th - Tap roots coming through bottom of rock wool - Gave first does of food.
- In a 1/2" gallon jug had 5.8 PH tap water mixed 1/4" strength of CalMag (1/4 teaspoon)
- Placed the above mixture in a dish, only about 1mm deep.
- Quick dip of each rock wool. Bottom only.
- Sunday, October 19th - Placed rock wool under 18hour light
- Monday, October 20th - Placed into micro dwc
- Roots popping out of the rock wool were over an 1" long
- Food was 1/2 strength of Advanced Nutrients Grow (Part A & B). (I used 2ml per gallon)
- Tuesday, October 21st - First leaves appear on all 5 plants.
- Thursday, October 23rd - Gave away 2 of my plants ( 1 Sweet Purple and 1 Jack Herer)
- Friday, October 24th - End of Week 0.
I germinated two of each strain. Only 1 White Widow didn't germinate properly, I gave it an extra 2 days in the paper town and afterwards still only a little root was showing. I placed it into rock wool on Saturday the 18th but didn't show any signs of change. The other 5 were growing without problems so it told me this seed was not good so by the 20th it was in the garbage. The heat source I use for the paper towels and rock wool is my PVR. There is a spot on the top that has just a little heat, just warm enough and perfect enough to germinate seeds and keep the rock wool warm. Works every time. However there is also a spot on top that is too warm and past experience I've cooked the seeds.
I don't use RO water at this stage, I use tap water for everything, and yeah I know chlorine, but doesn't seem to impact the seedlings one bit. My thinking is tap water has some minerals and nutrients that the seedling can use. I don't leave the water out for 24hrs either, goes from tap to whatever I need it for.
Getting the rockwool to the correct wetness is a skill I learned. Really don't want them heavy, just moist enough to create a high humidity within the rock wool for the seed head. The roots are already out and I want those roots to hunt for water so it's best not to have a lot of moisture. Seems the roots pop out the bottom quicker this way.
When the seedlings popped out of the rock wool this time, I noticed each of them had yellowish cotyledons. They weren't under a direct light source but still I hadn't seen this before, they usually come out at least a little more green. The roots popped out from the bottom of the rock wool within 12 hours so I gave them a light dose of CalMag for food. I placed the solution in a dish, not very deep and dipped the bottom of the rock wool in for just a second. Enough time for the root to get wet and for the bottom to absorb just a little.
The next day, I placed the plants under T5 lights (64K) and the next day they seemed to green up a bit. On the Monday I placed them in a micro DWC system, with food and they looked really healthy the next day. I thought the yellowish was caused by a combination of lack of light and food but my conclusion now is I too much heat when they were germinating in the paper towel and in the rock wool. Next time I'll move them more to the edge of the PVR where it's a little less warm.
Monday, October 20th - 3 days after popping out of the rock wool.
By Wednesday the roots had really grown long and they would need to be moved out of the micro DWC soon. The plants looked strong and I know now that they have a good chance of survival as long as I don't over feed. I don't need 5 plants so I gave two away.
Tuesday, October 21st - 4 days after popping out of the rock wool, roots grew quite a bit over 24hrs.
Friday I still haven't moved them out of the micro DWC, been too busy. Problem here is roots are about 8" long and can be pain to place into a net pot and not damage the roots when putting in the clay pebbles. Oh well next time i'll have to be more ready.
Cheers,
SB