Pure Kush - First Indoor Grow

Germination went well - 100% success rate. Seedlings look healthy and seems to be growing well/ I'm not able to get air temperature above 18 degrees Celsius during the day cycle but I don't think that will be an issue with this strain.

This week has been cold in the grow room with day time temps at 16c and night time around 12-13c. Growth this week has been quite slow and I wonder what has the biggest impact on growth rate. Is it temperature, light intensity or soil moisture levels? I've had the light at 25% since germination and wonder if it would be beneficial to start increasing the light levels or wait until they're more established before doing this. If anyone happens to read this and has thoughts about how to encourage faster growth, I'd be interested to hear.

It has been another slow week for growth. I've been working to optimize the environment. This is my first indoor grow in Europe during winter and with this equipment. There are a lot of variables that I have to figure out. I've added an oil heater on a temperature controller and have been gradually raising temps over the last few days. I also think I underestimated how much moisture my soil mix retains and maybe I've had humidity in the tent a bit too high. Both seedlings look a bit waterlogged. To try and fix this I'll keep RH at 50% for the next few days and let the soil get properly dry before watering again. Hopefully this gets things back on track and there's some strong growth this week! 💪

Seedlings are struggling. My guess is it's from over watering substrate with vermiculite in it but I'm not 100% sure. I've been fairly moderate with water. If they were in regular potting mix this amount of water would have been okay. Next time I'll start them in plain potting soil. I also thought that maybe there was a nutrient shortage because I'm using 25% coco coir but actually this seems unlikely. In any case I put a bit of extra soil on top of the pots. Despite the browning off this week the stems are still really strong. I'm still confident they will recover and just need time. The temperature fluctuations of the last week might have had a negative effect.

Poor babies! They've definitely had a rough start. I'm fairly certain now the issue has been too much moisture in the soil. I believe there are a few factors that have had an impact: 1) Obviously, giving them too much water. In the first week I gave 90ml into their 1 litre pots over two waterings. I thought this was okay because the top soil was completely dry between waterings. Someone suggested that seedlings don't need additional water for the first 10 days so I'll try that next time 2) Feedback I've had is that my soil mix is quite heavy @ 63% soil, 25% Coco, 6 % perlite + 6% vermiculite. In future I'll increase the perlite portion to about 40% 3) Also, I just noticed that the plastic pots I'm using have very small drainage holes. I think this has caused moisture to accumulate at the bottom of the pot. Yesterday I pushed my finger all the way to the bottom of the pot and it is much wetter at the bottom than at the top. So yeah, tough start. But they're still growing, albeit very slowly. I trust they'll survive.

Re-potted into ceramic pots today and, indeed, the bottom 3/4 of the soil was quite damp. The root system was larger than I expected but quite grey in color, not vibrant white. I'm going away for 10 days so I'll just leave these babies alone and hopefully they lively up themselves.

Awesome! Went away for 10 days over Christmas and was not sure what to expect when I got back. Obviously re-potting them and letting them dry out has been effective. I've started adding a little Fish Mix to their water. I don't think they need it but I'll go really slow and try it out on my tomatoes to see what effect it has on them. I'm cautious about drowning them in nutrients as I have no experience with this and don't want to slow the grow down any more than I already have.

All seems to be going well. I'm watering twice a week with 80ml per plant. Using mainly plain water with a little Fish Mix. If growth is strong this week, I'll look potting into 5 gallon pots next week. I've begun some small training with my fingers to keep the stalks malleable and see what shape I want. Once they're in their final pots I'll start training with clips.

I didn't see the explosive growth I was hoping for this week so I'll leave them one more week before transplanting into 20 litre pots. Since I'm really cautious about over watering I only gave them 80 mls this week which is why I think they're wilting. I'd really like to know what an appropriate watering schedule is for plants this size - how much water should they be getting each week? If anyone is reading this and could give a range it would be appreciated.

Very rough transplant into 5 gallon bags today. Ended up ripping quite a lot of roots from Plant 1 in particular trying to get them out of ceramic pots. Fingers crossed they recover okay and this doesn't slow them down too much. Plant 1 is showing pistils. Massive learning curve on this grow.

I'm happy with progress this week. The plants have handled the transplant well. I didn't need to water last week and plan to give them 1.3 litres over two waterings this week. Started training Plant 2 this week and it has responded very well. I'll give Plant 1 another couple of days for its secondary branches to catch up then start training it too. Removed old dry leaves from Plant 1. I've decided not to do any topping this grow because I'm so far behind.

Good week, plants seem to be doing well. No issues except for plenty of gnats in the tent. I removed some lower branches that were touching the soil after training. Gave approximately 200ml water/nutrients. There was no sign they needed more than that and their bags are still relatively heavy. I expected from next week that watering will need to ramp up but I'll see.

All good this week. Did a little bit of defoliation and some more training on the top of the plants. I'm just waiting for full coverage of the pot to flip to flower. I think I'll do it three days from now or this time next week at the latest.