Mataro Blue x DP Blueberry | First Indoor Grow

Hello everyone! Been off the forum for about 9 years (wow..) but now that things are settled I have had the opportunity to start growing indoors. I don't have much experience indoors, only from watching others really...and mostly hydro at that.

Vegged for 7 weeks. pH 5.8 - 6.0. Water with tap water and mix in nutes in 1gal container. I use a ph/moisture/light meter to help me know when to water. Zero runoff as growing in 10gal. Was using side lighting LED/t5 during veg. Also been doing some foliar feeding with a spray bottle as I as saw some yellowing leaves that eventually crisped up and fell off near the bottom of the plants. Think it is a Nitrogen issue but not totally sure. I have been feeding more heavily since.

They are growing closely together as I put the pots up again each other - growing in a 3x3x6.5" and I fear height may be an issue. Initially grew out in red dixie cups, went to half gal pot size, then to 10gal.

They're about 5 days into flower now (most recent photo).

Growing 3x Mataro Blue by Kannabia and 1x Blueberry by Dutch Passion;
-400w HPS
-10gal Soil (promix myccorhizae, little bit of special soil,
-Green Planet Medi-One during Veg (vegged for 7 weeks)
-Green Planet Liquid WP
-Green Planet Massive Bloom (first feed today)
-GH CaliMagic

All tips and comments are super appreciated! Hear to learn the ways of the indoors, as I am an outdoorsman!

Few more recent photos;

Any thoughts and tips would be supper appreciated!! Wondering if i am going to have a height issue and if its too late to bend er down? That one mataro is growing really tall

Day 10 Flowering. Explosive growth (stretching?) and starting to see buds forming.

Here is an update from this past week; decided to tie down the main stem of two of the Mataro's as vertical space becoming an issue. They popped right back up the next day. I also added a third fan to move some more air around and started feeding their flowering nutrient, which is Massive Bloom by Green Planet.

Currently feeding GP Medi-One, GP Massive Bloom, GP Liquid W8, GH CaliMagic

Lights on temp/hum around 21-24 C / 40-50% Humidity.

Lights off temp/hum around 17-19 C / 40% Humidity.

Think I will have to tie down the main stem of the tallest Mataro once again as this thing will just not stop growing!! Plants are all growing closely together and I feel like some of the under canopy might be a bit light deprived, but don't want to stress the plants out too much as they are just beginning to flower.

Any advice on how to tie down this main stem adequately? Also, should I be thinning out the under canopy?

Day 33 Flowering. Update.
(Finally took photos with lights off)

Temps remaining between 21-26 C. RH is between 30-40% with lights on.

Continue to tie down so that light can access all buds...considering pruning/trimming entire undergrowth canopy as it is not getting tons of light due to plants growing so closely together..

Have been experiencing yellowing fan leaves for the entire grow that eventually shrivel or "crisp" up, curl up, and then fall off the plant or can be plucked right off. Photos attached. Mostly happening to the biggest Mataro. I'm uncertain of what it could be, N deff, lock-out, ph problem, hard water from the tap water I've been feeding them...

It did have some light burn (where leaf is twisted) but I've since gotten her out of the light burn danger zone. I removed the really shriveled up, browning leaves from the undergrowth.

Today, I "flushed" each plant. Not a true flush at all, but I realized that I have had no run-off for most of the grow. I have been feeding and watering with 1gal each time, and they are in 10gal pots.

Feeding has been every 2-3 days, alternating feed / tap water pH 7.5. Growing in promix mycorrhizae hp soil.

Feed is GP Liquid W8 (6ml/gal) + GH CalMagic (5ml/gal) + GP Massive Bloom (20ml/gal) + GP Medi-One (25ml/gal)

I let them all dry-out (last watering was this past Thursday, so 4-5 days ago). I gave each plant 2gal of water so there was some runoff. I left the runoff to be re-absorbed by the plants. Here is how that tested;

Mataro 1 (back left, most issues); 800 ppm, 6.4 pH
Mataro 2 (front left, doing alright but experiencing shriveling leaves): 500 ppm, 5.8 pH
Mataro 3 (front right, same): 525 ppm, 5.6 pH
Blueberry (back right, shriveling leaves as well): 250 ppm, 6.4 pH

I realize there are some pH corrections I'll have to make to both my water/feed to mitigate further issues.

pH of the tap water I have been using is testing at 7.5 - 7.7 pH. Which is much higher than I anticipated.

All in all, the resin and flower production seems to be going well. Does anyone have any thoughts or suggestions on correcting the issue?

What does everyone do with their run-off?

Do you leave it to be re-absorbed, or get rid of it?

Day 35 Flowering. Update.

Plants seem to be responding well to the additional 2 gallons of water ran through their root systems. All the run-off was re-absorbed quickly (within 12 hours) except for the Blueberry, she took about 40 hours to re-absorb all of it.

After checking the run-off ppm, I don't believe I was over-feeding, but that the reason for the sick leaves could be soil pH. I am going to try to correct pH across the board this week.

I have tied up more stems as the weight of the buds was beginning to make some branches fall over. My carbon filter needs to be re-attached (fucking tape) so I'll have to get to that, which is not going to be fun/impossible to get to. Next time I need to give myself more room to work with the plants, it's a jungle in there.

My next feed is tomorrow morning, 3 days after I gave them the extra water. I'm going to look to add GP Rezin and Terpinator to the mix.

Day 37 Flowering. Update.

Continuing to prop up and tie branches so all buds are getting optimal light. Also making sure top colas are not too close to the light - some had already gotten some light burn. Definitely popcorn buds on the lower canopy.

Took a few of the sick leaves off and took individual photos (attached). Any comment on the issues present is super appreciated. I know there are certainly differing opinions on whether to prune, but I have been very gradually removing fan leaves that are sick/dying/dead.

I've bought 20 gallons of pure spring water so I'm going to see if getting the pH of the soil helps with the nutrient uptake of the roots, and mitigates further issues. Unfortunately, the spring water pH is testing at 8.3 and it has 300ppm. Not sure if that will help or not. Tap water is at 7.7 but is much harder water. I have some ph Down I could use...?

When I "flushed" to test the run-off ppm, I used distilled water at 0ppm and 5.8 pH. I had given each plant 2 gallons, and they are in 10 gallon pots.

Re-attached my carbon filter so the odor and air flow is much better now .

Temp with lights on/off: 25 C / 19 C
Humidity: 40-55%


If all goes well, I plan to take the Mataros down at Day 65 (April 13) and the Blueberry down at Day 63 (April 11). The Mataros flower seems to be maturing quicker though, already amber hairs on the flower, lots of resin. The Blueberry flowers are still much whiter.

Haven't given them any food since the flush 4 days ago. Gave the thirstiest one a gallon of water yesterday (tallest plant, back left, with the yellowing leaves), but the other three pots aren't quite dry yet.

Day 39 Flowering. Update.

Have done lots of work making sure all the taller branches are tied down or to the side, and not getting too close to the light.

I think the nute break and watering break has done them some good, continuing to water only the largest mataro today. Pruned several of the dying leaves away.

Had an interruption in the flowering cycle yesterday, lights were left off for an extra 6 hours (18 hours of darkness), but I just reverted back to their original 12/12 schedule, so they only got 6 hours of light yesterday.

Still unsure of the yellowing/blackening sick leaves, but buds are developing well so I will continue to go easier on the nutes and spread out the watering more.

The 3 smaller plants are still drinking from the 2 gallon watering I gave them 6 days ago. The 1 large mataro drinks much faster; I gave her another gallon 4 days ago and then one today.

Anyone have any idea here? (Also, pic of the ladies at night)

New Developments: After today's watering/feeding, I got some more runoff. Used 1.5 gallons per plant. 0.5 gallons of pure water to start slowly and gradually. Then fed an additional gallon of food. Water/Food combo was ~1300ppm, 6.3 pH before application.

Looks like I fucked up my ppm reading. The digital units are so small to read! The blueberry with the aforementioned issues...is clocking in at 1900ppm and 6.5 pH in the runoff (not 250, there was a little x10 symbol I did not notice). I've also noticed that the water is running through the pot really fast now...I'm wondering if the promix did become hydrophobic and is now repelling the water...

Other Runoff Readings:
Mataro with the yellowing issue (above) is clocking in at 800ppm, 6.4pH.
Mataro #2 is at 1700ppm, 5.9 pH.
Mataro #3 is at 750ppm, 5.9 pH.

Photos of run-off content (notice the Blueberry in the back right - this runoff was accumulated from 1.5 gallons in a 10 gallon pot after only 1-2 hours of drainage):

Been diagnosticating a lot more - next time around I am definitely going to try the amended soil method! I'm learning a lot and learning to appreciate the intricacies of indoor growing and mimicking an ideal growth environment...

The blackening/curling of the leaves has been progressing upwards up the Blueberry plant. It has also started to show on Mataro #3.

I have narrowed in on a few issues.

1) Need to hand-water less quickly and more evenly to prevent any dry spots.

2) PPM and pH readings in the runoffs are leading me to believe that there is some lockout happening and that the roots at the bottom of the pot are not absorbing nutrients at the same rate as the roots near the middle and top of the pot.

3) Plants are growing too closely together in too tight a space. Stupid to put 4 plants in 10 gallon pots in a 3x3x6.5' tent. They stretched like crazy, and they are growing all intertwined. It's a jungle in there. The top canopy is looking decent, resin production seems to be going well (mataros maturing faster than the blueberry, however) but the under canopy does not get enough light penetration (tiny popcorn buds, weak branches, slow growth)...

Based on the help received here and my findings;

- Blueberry #1 (below) needs to be flushed again to get rid of the salt buildup near the bottom of the pot. The leaves are not showing too many signs of a nutrient deficiency to the best of my knowledge...

View attachment 4304367

And, the bottom of the Blueberry;

View attachment 4304388


- Mataro #1 (below) wants to be watered and fed more, and more frequently. Drinks quickly and appears to need more food based off yellowing/dying fan leaves.

View attachment 4304370

- Mataro #2 (below) needs to be flushed again. There is a salt buildup around the roots. It doesn't need any more food for at least a week, and pH needs to be increased from 5.9 to 6.4 to allow for nutrient uptake. It may have a nutrient abundance issue..

View attachment 4304373

- Mataro #3 (below) needs to be flushed again to try to increase the pH of the soil. It is at 5.9 and I want it near 6.4-6.5. Seems to like the amount of food it is getting. Not sure on the rust spotting issue on this particular fan leaf, I've read it could be variety of things...

View attachment 4304375

Will update here as the situation progresses! Excited to share the harvest with ya'll - and even more excited for the next indoor grow.

Falco & Ness said:

Any thoughts and tips would be supper appreciated!! Wondering if i am going to have a height issue and if its too late to bend er down? That one mataro is growing really tall

Click to expand...

I ran Mataro Blue this summer it was a Monster Almost 9’ tall with bud sites all over it yielded 630 grams Beautiful girl!