A good way to grow your portfolio over the long term is to invest in growth stocks. While dividend stocks may offer more consistency, there's no guarantee that their recurring payouts will continue. And the potential stock price returns earned from a solid growth stock are more than what you can earn from a dividend, anyway.

With the coronavirus pandemic pushing stock prices down, there are many bargains right now that are likely to not only recover to recent highs but keep growing for years and even decades beyond. If you have cash available to invest, then the following three growth stocks are great options to add to your portfolio today.

1. Innovative Industrial Properties

Innovative Industrial Properties (NYSE:IIPR) is a real estate investment trust that offers investors one of the safest ways to invest in the growing cannabis industry. By providing real estate to the medical marijuana industry, Innovative Industrial isn't taking on any of the growing risks. Nor is it concerned about whether the product will be at a high enough quality or whether it will sell at a large profit. The company has locations all across the country, partnering with several different growers.

In 2019, Innovative Industrial generated $23 million in earnings on revenue of $45 million. That's more than triple the $21 million in net income the company earned in 2018 from revenue of $15 million. And with New York making up the largest portion of its rental revenue at 15%, Innovative Industrial isn't overly exposed to one state or one part of the country. And that's important for cannabis investors, given the volatility of the sector in the past year. Layoffs and poor-performing results are just a couple of the reasons why investors are hesitant to invest in pot stocks these days. One of the ways Innovative Industrial benefits from the industry's growth without taking on much risk is that it buys distressed cannabis assets and then leases them back to growers.

Cannabis plant.

Image source: Getty Images.

With a profit margin of 50% in 2019, it's one of the few cannabis investments that investors can rely on to stay out of the red. As the cannabis industry continues to grow, Innovative Industrial can become an even hotter buy as it acquires more properties across the country. The REIT stock is down 2% since the start of 2020, which is impressive given the 24% decline that the S&P 500 has been on during that time. Although it's a bit expensive today, trading at around 35 times its earnings, its bottom line is likely to get stronger with the industry's growth.

The stock also pays investors a quarterly dividend of $1 per share, which yields 6% annually. Since Innovative Industrial is a REIT, it needs to pay out 90% of its earnings out as dividends. Investors don't have to worry about a dividend cut and as long as earnings continue to grow, so too will their payouts.

2. Adobe

Adobe (NASDAQ:ADBE) is a software company with a dominating presence in the market through its popular suite of products. Whether it's Photoshop or Illustrator, consumers flock to the company's products because they're top of the line. With Adobe moving to a subscription service where consumers pay a monthly fee for the Adobe Creative Cloud to access many of its top products, it's a clever way to generate recurring revenue and a lot of consistency in its financials. And for many advertising professionals, it's a necessary business expense.

In fiscal year 2019, Adobe earned just under $10 billion in revenue from subscriptions. That was 89% of the company's total sales. In fiscal 2018, subscriptions made up 88% of total revenue and accounted for 84% of sales the year before that. 

Shares of Adobe have slipped a modest 4% this year. That may come as a bit of a surprise given that the stock isn't cheap -- it trades at close to 50 times its earnings. However, investors and analysts remain bullish on the company's growth, as it has a PEG ratio of just 1.6 over the next five years. A low PEG value (ideally of 1.0 or less) suggests that there's sufficient long-term growth to justify the stock's current price-to-earnings ratio. That's why any dip in value for shares of Adobe can make it an attractive time to buy the stock.

The company's consistently generated a profit margin north of 22% in each of the past 10 quarters, and sales growth of more than 20% in its most recent quarter only confirms that Adobe is still growing at a very good rate. While investors may want to wait for more of a decline before buying shares of Adobe, the stock may not get much cheaper.

3. Walt Disney

Walt Disney (NYSE:DIS) is another well-known and well-loved brand around the world. The company has created countless movies over the years, many of them masterpieces that consumers watch over and over. And the company continues to create new content that captivates viewers, proving that it hasn't run out of ideas, either. Although its business remains strong, the stock has felt the effects of the coronavirus pandemic as shares of Disney are down 29% in 2020, far below the 23% decline of the S&P 500 during that time.

The company shut down Disney World and Disneyland in light of the coronavirus, and the effect of people staying indoors will hurt its sales this year. But the good news is that the company's a good bet to rebound, as it's consistently posted profits over the years and they've increased as well. From a profit of $7.5 billion in fiscal 2014, Disney's profits rose 47% to $11 billion this past fiscal year. Over five years, that's an average growth rate of 8%  It also has produced positive free cash flow in each of the past 10 years, meaning that there's room for the company to be able to absorb a hit to its financials this year.

The company's new streaming service, Disney+, is also showing positive growth numbers. A day after it launched on Nov. 12, it already had more than 10 million subscribers. And by the time the company released its first-quarter results on Feb. 4, 2020, that number had already grown to 28.6 million. 

Disney's stock is coming off a new 52-week low, and now could be a great time to buy it while it's still around $100 -- it was just last month that the stock was trading at more than $140. It may take a while to get back there, but while the coronavirus is keeping the stock down today, it's not an issue that will likely persist over the long term. And that's why Disney could be a hot buy today. It also offers investors a semi-annual dividend of $0.88, which yields about 1.7% annually. That's a little less than the 2% investors normally earn with an average stock from the S&P 500.

Which is the best one to buy today?

Adobe is the best of the three growth stocks here, and that's largely to do with the company's focus on tech. Since it doesn't require foot traffic and the products are digital, Adobe is more flexible than Disney or Innovative Industrial. That's evident in the stock's minimal losses thus far related to the coronavirus pandemic. It's a great buy over both the short and long term.