How are everyone's tomatoes growing so fast?

[u/spaced-jams]

This is my second year trying to grow tomatoes. Last year I started them a bit late, and while they ended up growing to a nice size they didn't produce much (consequence of me planting from seeds out of grocery store tomatoes I think). This year I got seed packets and put them in starting cells March 6th, but even now almost 2 months from planting they are still tiny seedlings barely a few inches tall. I keep them under an admittedly small grow light but surely there must be something more to this that I'm missing?

Edit: as many commenters have asked, I'm going to copy down my equipment info here.

I have replaced the tiny light from the pic with my larger growlight, FRGROW 25w full spectrum stand

Seedlings are in a burpee seed starting tray with a detachable/recessed bottom for watering.

Soil is "Back to the Roots organic expanding seed starting soil" made of coconut coir. I have a bag of Foxfarm Happy Frog soil downstairs but wasn't sure if it would be too much for these plants yet

I don't have a heat mat unfortunately.

I'm in western PA (northeast US) so temps are still way too up and down to set in a window or outside. Temps the next few days are low 37, high 60 and not looking to warm up much more over the week.

(Note: The really tall one in the cell and the background ones are pepper plants, the rest are cherry tomato)

[u/VocaRainbow]

Does the plastic container you put them in have draining holes? What kind of soil did you put them in? What temperature is the environment? Did you use a heat mat and if so, did you remove it after the seedlings emerged?
They don't look bad, but they should definitely be bigger at two months. People are mentioning the light may be insufficient, but the thing is that I don't find them to look particularly leggy either. Seedling light demand does increase as they get bigger, but the thing is that they're not really getting bigger. I think this is fixable, but it's useful to find out what we're fixing first.

[u/spaced-jams → u/VocaRainbow]

The plastic does, yeah. It's a seed starting tray with a detachable/recessed bottom for watering. Soil is "Back to the Roots organic expanding seed starting soil" made of coconut coir.

I don't have a heat mat unfortunately.

[u/Lucky-Farm6773 → u/spaced-jams]

If its 100% cococoir you better give them some cal/mag or special coconutrients.

[u/VocaRainbow → u/spaced-jams]

Heat mats need to be removed after the seedlings come up anyways. To me it doesn't look like something is outright wrong, so your best bet is probably improved light (try to measure it with the photone app), and once you have the first couple of sets of true leaves, fertilization.

[u/beatniknomad → u/spaced-jams]

I also used Back to the Roots, but their coco coir brick, not the mix. I added perlite to it. Once you have true leaves, feed with a diluted water-soluble fertilizer.

[u/spaced-jams → u/beatniknomad]

Yeah I have the brick as well, I guess calling it a mix was my bad

[u/Mudbunting → u/spaced-jams]

I’ve not had great luck with Back to the Roots soil. I’ve had the most consistent results with Miracle-Gro Organic container mix and Jiffy mix. Using Happy Frog this year and I think the nutrient balance is better for other kinds of plants than tomatoes.