Answer: Monrovia does sell Bergenia cordifolia, the heartleaf Bergenia. Japanese Maples are generally available in spring, but some nurseries have them for sale all summer and into the fall months. Monrovia does not sell chameleon Euphorbia, but these plants are commonly available in your area.
Artichokes can be started from seed or from dormant roots; sometimes garden centers will pot up the roots and sell the plants later in the summer. You'll want to check with your local nursery to see if they have any started.
Coleus is frost tender. If your garden does not regularly receive frost, coleus will be a perennial plant. The leaf color intensifies in full sunshine, but too much sun can burn the leaves. For the brightest color, provide a few hours of morning sunshine to your coleus, but make sure they have shade from hot afternoon sun.
Best wishes with your garden!
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