Darwin 2027 Catalog - Star Roses

Product information and culture charts at darwinperennials.com

CROP SCHEDULE & USES 1-QT. (10-CM) POT, 1 PLANT PER POT

PESTS AND FUNGAL DISEASES

PLANT GROWTH REGULATORS

PINCHING AFTER TRANSPLANT

2 TO 3-GAL. (25 TO 30-CM) POT, 3 PLANTS PER POT Unrooted: 19-22 wks Rooted: 12-14 wks

USDA HARDINESS ZONES

BLOOM MONTHS April to September

1-GAL. (15-CM) POT, 1 PLANT PER POT Unrooted: 15-17 wks Rooted: 10-12 wks

HEIGHT

12 in. (30 cm)

Unrooted: 10-14 wks Rooted: 8-10 wks

Yes

PGRs generally not needed

Spider mites, thrips. Watch for INSV/TSWV.

5-8

Yes

PGRs generally not needed

White fly, spider mites

Not recommended Rooted: 10-12 wks Rooted: 12-14 wks

18-20 in. (46-51 cm)

May to August

5-9

Uniconazole-P sprays beneficial Spider mites, thrips Not recommended Unrooted: 19-22 wks Rooted: 12-14 wks

Unrooted: 21-23 wks Rooted: 14-16 wks

20-24 in. (51-61 cm)

Second trim after liner pinch is beneficial

July to August

6-9

Not recommended Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 19-22 wks Rooted: 12-14 wks

30-34 in. (76-86 cm)

Yes

PGRs generally not needed

Spider mites, thrips. Watch for INSV/TSWV.

May to July

5-8

Not recommended Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 14-16 wks Rooted: 10-12 wks

28-30 in. (71-76 cm)

Recommended PGRs generally not needed

Pythium can be a problem if overwatered. White fly, spider mites. Powdery mildew when pressure is high. Powdery mildew when pressure is high. Powdery mildew when pressure is high.

July to September

3-9

Rooted: 7-9 wks

Rooted: 10-12 wks Rooted: 12-14 wks

14-16 in. (36-41 cm)

Benzyladenine at 600 ppm to increase branching

April to May

4-8

Rooted: 7-9 wks

Rooted: 10-12 wks Rooted: 12-14 wks

6-8 in. (15-20 cm)

Benzyladenine at 600 ppm to increase branching

Yes, in cases where there are two or less shoots. Yes, in cases where there are two or less shoots. Yes, in cases where there are two or less shoots.

April to May

4-8

Not recommended Rooted: 10-12 wks Rooted: 12-14 wks

16-18 in. (41-46 cm)

Benzyladenine at 600 ppm to increase branching

June to August

4-9

Not recommended Rooted: 10-12 wks Rooted: 12-14 wks

18-20 in. (46-51 cm)

Benzyladenine at 600 ppm to increase branching

Powdery mildew when pressure is high.

June to August

4-9

6-8 wks

10-12 wks

12-14 wks

6-8 in. (15-20 cm)

None

PGRs generally not needed

Pythium and rhizoctonia can result from overwatering.

April to June

5-9

No

Daminozide/chlormequat chloride combination at 3,750 ppm/500 ppm can be used to tone foliage. May delay flowering. Uniconazole-P sprays after flower initiation if needed. PGRs generally not needed

Aphids, leaf miners, leaf spot

Not recommended 12-14 wks

12-14 wks

30-34 in. (76-86 cm)

Late June to September

5-8

Yes

White fly, thrips

Rooted: 6-8 wks

Rooted: 8-10 wks Rooted: 12-14 wks

12-14 in. (30-36 cm)

March to September

7-9

PGRs generally not needed

White fly, spider mites

Unrooted: 12-14 wks Rooted: 8-10 wks

Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 16-18 wks Rooted: 12-14 wks

16-18 in. (41-46 cm)

Once for smaller pot sizes, twice for larger containers.

March to September

7-10

Yes

PGRs generally not needed

White fly, spider mites, botrytis

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 17-19 wks Rooted: 12-14 wks

20-22 in. (51-56 cm)

March to September

4-9

Yes

PGRs generally not needed

White fly, spider mites, botrytis

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 17-19 wks Rooted: 12-14 wks

22-24 in. (56-61 cm)

March to September

4-9

Spider mites

Not recommended 10-12 wks

12-14 wks

14-16 in. (36-41 cm)

Typically not required

Will respond to 300 ppm benzyladenine spray at young plant level

March to September

4-9

Unrooted: 12-14 wks Rooted: 8-10 wks

Not recommended 2-4 in.

PGRs generally not needed

Generally pest and disease free.

Unrooted: 10-12 wks Rooted: 6 wks Unrooted: 10-12 wks Rooted: 6 wks Unrooted: 10-12 wks Rooted: 6 wks Unrooted: 10-12 wks Rooted: 6 wks

One pinch, two to three weeks after transplant. One pinch, two to three weeks after transplant. One pinch, two to three weeks after transplant. One pinch, two to three weeks after transplant.

3-9

(5-10 cm)

Unrooted: 12-14 wks Rooted: 8-10 wks

Not recommended 7-10 in.

Generally pest and disease free.

PGRs generally not needed. B9 is effective if needed, especially under lower light conditions

July to August

5-9

(18-25 cm)

Unrooted: 12-14 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

3-6 in. (8-15 cm)

PGRs generally not needed

Generally pest and disease free.

Non- flowering

4-9

Unrooted: 12-14 wks Rooted: 8-10 wks

Not recommended 2-5 in.

PGRs generally not needed

Generally pest and disease free.

July to August

5-9

(5-13 cm)

Rooted: 4-6 wks

Rooted: 6-8 wks

10-12 wks

2-5 in. (5-13 cm)

Typically not required

Not particularly sensitive. Use well- drained media.

June to July

4-8

Yes

PGRs generally not needed

Aphids, white fly

Not recommended Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 16-18 wks Rooted: 12-14 wks

14-18 in. (36-46 cm)

April to September

4-9

Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 16-18 wks Rooted: 12-14 wks

12-14 in. (30-36 cm)

Yes

PGRs generally not needed

Aphids, white fly

Unrooted: 10-14 wks Rooted: 8-10 wks

May to October

4-9

Unrooted: 11-13 wks Rooted: 6-8 wks

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 13-15 wks Rooted: 8-10 wks

8-10 in. (20-25 cm)

Recommended PGRs generally not needed Watch for thielaviopsis, pythium, white fly, spider mites.

February to October

4-9

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