RISBARA'S GREENHOUSE
426 Randolph St., Portland, ME 04103
(
207) 797-0066  fax (207) 797-5782

 

          
Frequently Asked Questions

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When is it safe to put annuals out?
After the full moon in May the threat of frost is usually over.

When is it safe to put perennials out?
Our perennials are over wintered. They can go out anytime. They are extremely hardy.

What can be put out early in April and May?
Pansies and Violas. They love cold weather. When the temperature warms in the summer, cut back the pansies to about 3 inches, plant hot weather plants around them. When the weather starts to cool in late August, the pansies and violas will rebloom and continue through November.

What plants are good for hot dry areas?
We have many. Melampodium (yellow daisies), Vinca(red,rose,white flowers),viscaria(a new plant, blue flowers),portulaca(many beautiful colors), verbena(red,blueviolet,mix,white),salvia(red,white,blue),Lantana,geraniums(zonal in 14 colors and seed in 6 colors)

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What plants are good for shade?
Tuberous begonias are outstanding in the colors that they come in. They have large flowers and are non-stop in putting on blooms. Impatiens and double impatiens that look like rosebuds come in every color imaginable. Torenia or clown plant has an open throat with a wishbone in it. Comes in blue or pink. Mimulus or monkeyplant comes in shades of red and yellow.

What's the secret to putting together a window box?
There is really no secret to window boxes. Just important steps. Choose the colors that you find pleasing. Use a box with drainage, new potting soil (possibly adding compost or SoilMoist to retain moisture),osmocote for fertilizer and then add your favorite plants. We're happy to help you.

What's the difference in a zonal geranium and seed geranium?
We grow the seed geraniums by seed starting in January. The zonal geranium is grown by planting a cutting from a large "mother" geranium. The zonals are bigger and put on more flower stalks. The seed geraniums are perfect for a smaller container or when economy is important.

What perennials are good for the sun?
There are many tried and true. The ground Phlox is in bloom now as well as candytuft and snowcap arabis. Later, delphiniums, echinacea(cone flowers), rudbeckia(brown-eyed Susans), coreopsis, Salvia, tall Phlox, Sedum( both groundcovers and tall). We have hundreds including many not so common.

What perennials are good for shady areas?
Primrose, lily-of-the-valley, Trollius(double buttercup), hosta(of course),columbine, Doronicum, ferns, grasses, day lilies, iris and many, many more.

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426 Randolph St., Portland, Maine 04103
(207) 797-0066  fax (207) 797-5782