I second what Rymm said. Cloudsbreath is a big seller right now, its well past its peak but I don't think its reached a low point yet. Jute is a slow and steady kind of mat; not many people grow it anymore so it maintains its value and its fairly stable. Lots of level 50 stuff is still popular for glams, furniture and minions so there's a good market for it. Bloodpeppers seem to be in almost every end game minion since 3.4 so they always sell well and Thavnairian onions are an open ended market with constant demand.

You'll get glazenuts from making thav onion seeds and bloodpepper seeds. They're currently selling low but they tend to spike high during patches with new furiture and housing.

While Bloodpepper and thav onions do have crossbreeds I don't have much use for them personally so i tend to crossbreed in the garden and grow those with the indoor flower pots.

Another thing to note is Jute + Mandrake is a perpetual Jute cycle. Once you get about 8 Jute seeds for a buffer start intercrossing them with mandrake. Each intercross also yields jute seeds and I typically get 3-5 seeds per harvest. As long as you have a small buffer you can effectively replant jute endlessly.