small plants

El substrato no parece de muy alta calidad. Cuál estás utilizando? Parecen lentas para 7 días desde plantadas, pero algunas semillas pueden tardar hasta 10 días en germinar Mi consejo: no rieges en exceso. Tapalas con la mitad superior de botella sin el tapón para tener un alto ratio de humedad. Ajusta la lámpara a una distancia que te dé 250 PPFD a altura cero desde el substrato (te recomiendo Photone). Y paciencia las primeras semanas. Son lentas al principio!

i definitely think the substrate could have some more perlite or similar in it. with high water capacity "soil," you want near 50/50. Something like coco only needs 30% because the water retention is 2/3rds of your typical "soil" mixture - all other factors remaining the same. But, i also think you are giving too much light based on seedling in front/right of first pictures. all 3 growth nodes have very little space between them. that means the light was probably too close too early. you may very well give more than that when the plant is mature, but early on you have to watch the distance between growth nodes ("internode" length) and adjust accordingly. if all the leaves look like they are tightly packed, it's too much. too much stretch needs more. Also, some of these look lik ethey just sprouted vs 1 week above ground. are you counting 7 days including the timem it too to sprout? count from the time it started receiving light (sprouted) and it'll be a more consistent timeframe. how much light it receives is the single greatest factor, even if a seedling comes packed with 'some' power its own growth for a short period of time. I doubt those plants with 2 cotyledons and virtually no sign of 2nd set of leaves is 1 week old from sprout, but i've been wrong before, too. it is slow at first. it's an exponential growth rate up to a point later on, but starts slowly.

Die Damen müssten wirklich schon viel weiter gewachsen sein. Ich vermute Probleme mit dem Substrat (nicht fluffig, kein Luftdurchlass) und / oder der Bewässerung (zu viel Wasser). Ist wirklich schwierig zu beurteilen, ohne nähere Informationen dazu zu haben.