Introducing a very special hibiscus to brighten up late-season gardens or highlight a landscape focal point. Holy Grail is deep and mysterious, with nearly black foliage and dark, rich red blooms that grow to an impressive 8-9" wide. Once the beautiful flowers have finished their season, vivid green calyxes take their place, contrasting nicely with the dark foliage. Butterflies and other beneficial pollinators will flock to the award-winning flowers throughout the growing season. For best results, plant in a well-drained area with consistent moisture. PP31478
Hardiness Zones 4-9
Mature Height 4 - 5 feet
Bloom Time Midsummer to early fall
Light Requirements Full Sun, Half Sun / Half Shade
Wide strap-like fleshy leaves begins its growth during and after flowering.
Mature Spread :
4.5 - 5 feet
4.5 - 5 feet
Planting Instructions :
Dig a hole deep enough to accommodate the roots without bending them. Roots should be just below the soil surface with the crown at the soil level.
Soil Moisture :
Will Tolerate :
Acidic Soil, Clay Soil, Loamy Soil, Sandy Soil
Pruning Instructions :
None, except to prune into desired form.
Winter Care :
Mulch +/- 2"
Planting Depth :
Top of plant should be even with soil level or slightly above.
Watering Requirements :
Average water needs. Water regularly, do not overwater.
Fertilization Requirements :
Once per year
Special Care :
K. van Bourgondien times its shipments from Holland so that bulbs arrive at the proper planting time
climatic conditions) for each area of North America.
We take advance reservations, and then just as soon as the crops are
harvested, our staff of K.
van Bourgondien experts makes an on-the-spot selection of the finest bulbs available to fill those
We will pack and ship your order based on the following schedules.
Orders for gift certificates will be shipped immediately.
Due to hot weather conditions, we are unable to ship any plant items from late June through August.
General merchandise will be shipped with your plant order.
The type of product you order or the weather in our area or yours may affect the anticipated
schedule.Large orders may be shipped in more than one
package.Your order confirmation will have an estimated shipping time.When your order is actually shipped you will be sent
an updated shipping estimate.You may check your order status at any time on this website using your email or account number
provided on your order confirmation.Please note that we cannot ship outside of the 48
contiguous states. Click here for zone map.
Questions & Answers
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