Petunia, Sky Blue
Rare sky-blue flower color.
Beds, Container, Filler, Spiller
Plant Shipping Information
Item 220316 cannot ship to: AA, AE, AK, AP, AS, CN, FM, GU, HI, MH, MP, PR, PW, VI See all Burpee plant shipping restrictions for your state
Petunias may be grown from seed sown early indoors and transplanted outside after frost, or from potted plants.
Sowing Seed Indoors:
- Sow petunia seeds indoors 8 weeks before last frost using a seed starting kit.
- Sow seeds thinly and barely press into seed starting formula. Do not cover with soil.
- Keep the soil moist at 70-75 degrees.
- Seedlings emerge in 10-14 days.
- As soon as seedlings emerge, provide plenty of light on a sunny windowsill or grow seedlings 3-4 inches beneath fluorescent plant lights turned on 16 hours per day, off for 8 hours at night. Raise the lights as the plants grow taller. Incandescent bulbs will not work for this process because they will get too hot. Most plants require a dark period to grow, do not leave lights on for 24 hours.
- Thin to one seedling per cell when they have two sets of leaves.
- Seedlings do not need much fertilizer, feed when they are 3-4 weeks old using a starter solution (half strength of a complete indoor houseplant food) according to manufacturer’s directions.
- Transplant hardened-off seedlings to the garden after the frost.
- Before planting in the garden, seedling plants need to be “hardened off”. Accustom young plants to outdoor conditions by moving them to a sheltered place outside for a week. Be sure to protect them from wind and hot sun at first. If frost threatens at night, cover or bring containers indoors, then take them out again in the morning. This hardening off process toughens the plant’s cell structure and reduces transplant shock and scalding.
Planting Potted Plants in the Garden:
- Select a location in full sun with good rich moist, well-drained organic soil.
- Prepare the bed by turning the soil under to a depth of 8 inches. Level with a rake to remove clumps of grass and stones.
- Most plants respond well to soils amended with organic matter. Compost is a wonderful form of organic matter with a good balance of nutrients and an ideal pH level, it can be added to your planting area at any time. If compost is not available, top dress the soil after planting with 1-2 inches of organic mulch, which will begin to breakdown into compost. After the growing season, a soil test will indicate what soil amendments are needed for the following season.
- Plants should stand 6 to 12 inches apart in the garden.
- Dig a hole for each plant large enough to amply accommodate the root ball.
- Place the top of the root ball even with the level of the surrounding soil. Fill with soil to the top of the root ball.
- Press soil down firmly with your hand leaving a slight depression around the plant to hold water.
- Water thoroughly, so that a puddle forms in the saucer you have created. This settles the plants in, drives out air pockets and results in good root-to-soil contact.
- Use the plant tag as a location marker.
- Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their seeds from germinating.
- Mulches also help retain soil moisture and maintain even soil temperatures. For annuals an organic mulch of shredded leaves lends a natural look to the bed and will improve the soil as it breaks down in time. Always keep mulches off a plant’s stems to prevent possible rot.
- Keep plants well-watered during the growing season, especially during dry spells. Plants need about 1 inch of rain per week during the growing season. Use a rain gauge to check to see if you need to add water. It's best to water with a drip or trickle system that delivers water at low pressure at the soil level. If you water with overhead sprinklers, water early in the day so the foliage has time to dry off before evening, to minimize disease problems. Keep the soil moist but not saturated.
- Until plants become established, some protection from extreme winds and direct, hot sunlight may be necessary. Good air movement is also important.
- After new growth appears, a light fertilizer may be applied. Keep granular fertilizers away from the plant crown and foliage to avoid burn injury. Use low rates of a slow release fertilizer such as Flower-tone, as higher rates may encourage root rots.
- Remove spent flower spikes to encourage flowering and prevent seed development. Pinching the growing tips of plants can encourage bushiness.
- Monitor for pests and diseases. Check with your local Cooperative Extension Service for pest controls recommended for your area.
- Remove plants after they are killed by frost in fall to avoid disease issues the following year.
- Cut scraggly petunia plants back by half in late summer to spur growth and encourage new flowers to form.
- Petunias make beautiful edging plants and also can be combined with other summer-blooming annuals in mixed plantings. They are superb in containers of all sizes and types, either alone or combined with other flowers.
- Petunias attract hummingbirds and moths to the garden.
SunFull SunHeight8-10 inchesSpread12-14 inchesOrnamental UseBeds, Container, Filler, SpillerLife CycleAnnualSow MethodIndoor SowFloweringtrueBloom Duration12
Petunia, Sky Blue is rated out of 5 by 12.Rated 2 out of 5 by TheLoneGardener from What you see is NOT what you get... Disappointed in the color. Not blue, but lavender.Date published: 2015-06-18Rated 5 out of 5 by chickpee from These are beyond gorgeous! So no, maybe not a true blue, but they are so very close and so pretty. I bought 2 six packs, and I have to buy at least 2 more. They are pricey, but so pretty, I'll spend the bucks every summer. I put together a pot of these with the black cat petunias and it is lovely!Date published: 2015-05-18Rated 5 out of 5 by MummyLovesFlowers from Beautiful strong flowers I know there are a lot of complaints about the color not being sky blue but blueish here, but the plants are still a beautiful light bluey-purplish color, and produce like mad all summer and long into the fall! If you're searching for true blue go morning glories, but after trying these out one year, I filled my deck railing containers with them, snapdragons, verbena, allysum, vinca vines, and some portulacas, and enjoyed an amazing show! They're drought tolerant, as they can get fairly baked in the direct deck sun in containers, and all I did was water and deadhead. I didn't fertilize as I turn home compost in at the beginning planting. The portulacas came back when I was away for three months, too! I've had them every year since, and if UPS doesn't smash my package to bits (happened one year), they have proven to be such an enjoyable flower! Cascades over edges of containers with tons of flowers and smells lovely. So regardless of color still fit into scheme and I'll continue to buy these as long as they have them! Now I'm moved to NH so we'll see how they do here this summer!Date published: 2015-03-26Rated 5 out of 5 by Muffinmanny from Not true blue but grew like a weed! Like some of the other reviewers, the color of my petunias was bluish, not true blue. However, these flowers were prolific bloomers, best petunias I ever planted! So fellow gardeners, buy these plants if you can be flexible on the color. I'm planning to next year.Date published: 2014-11-14Rated 1 out of 5 by Flowertopia from Not as advertised I searched many websites for the allusive azure blue petunia, that I had found my source. Needless to say as others before me not as promised. If special additives are needed to acquire color described, it should be sold with product.Date published: 2014-06-21Rated 3 out of 5 by RedHairedRockHead from Not blue, even under ideal circumstances. I am pretty disappointed. I depended on the Burpee name, and disregarded the reviews that said this flower was purple. These flowers are a pretty lavender color, but they don't come anywhere near 'blue', or anywhere near the color of the flowers on the product page. Yes, monitors can change the intended colors a bit...but come on. No monitor in the world would show my flowers as blue as the Burpee picture, without Photoshop intervention. And yes, they get over eight hours of direct sun per day. That said, they arrived healthy (although weeks later than expected), and have grown like gangbusters, they are as speedy and prolific as Wave petunias, as long as they are provided with plentiful, frequent fertilizer. So, one star off for late arrival, one star off for false advertising, and one star off for disappointing me.Date published: 2013-07-06Rated 2 out of 5 by NLDgardener from NOT Sky Blue These are purple that will fade to a pretty lavender which is the reason for the two-star rating. You can see the color on the websites of other vendors. They are just NOT sky-blue like a morning glory as in the Burpee photo. If they were sky-blue, I would love to buy a lot, but I will just stick with morning glories for now.Date published: 2013-06-04Rated 2 out of 5 by kcofield from Also disappointed with the color These petunias are lavender and do not change to the beautiful sky blue shown in the picture. I have adjusted sunlight and fertilizer to attempt to get them to be this color, but without luck. Still a beautiful petunia, just didn't fit with my color scheme.Date published: 2013-05-18