Hi Tracy,
Sorry to hear you got into these stocks near their peaks. Momentum investing traps many retail investors. We consistently advocated against investing in the sector as cannabis companies where trading at ridiculous valuations. There was also lots of questionable activity and for the most part, these companies were (and some still are) led by management teams that have no experience in governance.
That being said, what should you do now? Assuming you have held on, you'd be looking at losses of 74% and 62% respectively. Don't feel bad, the oil & gas industry has lost just as much if not more in some cases. Most every Canadian is sitting with big losses in their accounts at the moment.
Has the sector bottomed? There is no real way to tell. Can they qualify for some of government bailout money? That is also an unknown.
Averaging down is probably not the best course of action here. Since there are still many unknowns, it is best to invest your money in higher-quality stocks in this market.
Should you sell? Not necessarily. If you believe you can invest that money into others that will yield greater returns. Then perhaps selling is the best course of action. If you don't need the cash and believe there will be a big rebound in the sector once volatility subsides (a realistic possibility), then there i no harm holding.
I realize I didn't answer your question outright, but buying and selling stocks is dependent on each individual's financial situation and risk tolerance.
Hope that helps!
Mat