Outdoor grow, is my plant too small?

It is 1 month from germination of seed, outdoors the whole time in a huge planter box (a few hundred gallons).

I am living in the southern hemisphere so it is spring right now.

The plant is 4 inches tall with 3 nodes.
The biggest fan leaf is about 2 inches.

Gets about 7 hours of direct sunlight daily

Hey buddy, its hard to tell without pics or info like soil type, nutes etc. If the leaves seem healthy then let her do her thing, 30 days from germination isnt very long at this stage but you'll find it picks up pace once more leaves set in. By the way is that right when you say 'few hundred gallons'? thats huge amigo, would love to see that! good luck

Yeah after a few leaves set in their growth should speed up like Zaycor said.
My thoughts are that this late in the season the sun isn't as strong so growth won't be quite as quick. Best of luck regardless.

Yeah later in the season and early in the season, growth can be quite slow. Not sure about the southern hemisphere, but in the Northern hemisphere right now, it's quite cold for optimum growth especially in early veg/seedling stage. Seedling will grow in semi cold weather, just drastically slower usually until it warms up and/or enters the vegetative stage and thrives. So I guess just be patient and let her do her thing, usually plants spend time building a root system before building the upper canopy.

Lol its only November bro, still 3 months veg left.

With 7 hours direct it'll grow atleast 8-10ft depending on climate/latitude and nutes.

If it's sativa dominant and you say a couple hundred gallons? It'll grow into an absolute monster.

Just planted mine last night.

Equivalent to May for any N.hemisphere reading this.