I couldn't upload photos via the initial comment so here they are. I'll start off with the ponderosa. It has 2 large lemons, 1 medium lemon and 1 small lemon.... It has 1 new shoot with small blooms.... So it might start flowering all around soon.

Below is the sanguinelli blood oranges, looks very healthy and full of new growth.

that looks awesome. Maybe you could help others by telling us what potting mixture you use and fertilizer schedule.

I stop fertilizing in October and I start up again in January when we start getting more sun and longer days. I'll give my trees a small amount of fertilizer every 2 weeks or so.

Potting mix is pretty simple, Miracle Grow Citrus and Cactus mix. I let my pots get a bit on the dryer side before I give it a good watering.

Do you know what rootstock they’re on? And what type of planter do you have? Plastic, cement, clay?

The Ponderosa is on it's own roots (cutting) and I got it at a random small chinese garden store in Toronto. The blood orange I'm not sure... I swear the guy told me it was on Yuzu rootstock.... but the tag is labelled as SANR16... and I noticed on his website he sells rootstock known as Rich 16-6. If I go by the tag, it was grafted in summer 2015.... which seems way too small for a 4.5 year graft..... I do know that I've had it for about 2 years now.