Darwin Perennials 2026 Catalog

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

PLANT GROWTH REGULATORS

PINCHING AFTER TRANSPLANT

PESTS AND FUNGAL DISEASES

2 TO 3-GAL. (25 TO 30-CM) POT, 3 PLANTS PER POT

USDA HARDINESS ZONES

1-GAL. (15-CM) POT, 1 PLANT PER POT

BLOOM MONTHS March to November

HEIGHT

Spider mites, thrips Not recommended Rooted: 10-12 wks Rooted: 12-14 wks

14-16 in. (36-41 cm)

5-9

Yes

B-Nine/Cycocel combination at 3,750-5,000 ppm, B-Nine/Cycocel 500 ppm before flowering. Sumagic spray can be used after flowering if needed.

Recommended PGRs generally not needed

Powdery mildew, aphids

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

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

18 in. (46 cm)

5-9

May to July

Typically not required

PGRs generally not needed

Aphids on the buds Rooted: 6 wks

9-11 wks

Not recommended 4-6 in.

5-9

March to October

(10-15 cm)

Not recommended Winter: 12-16 wks; Summer: 10-12 wks

Winter: 12-16 wks; Summer: 10-12 wks

24-28 in. (61-71 cm)

5-8

April to July

None

PGRs generally not needed

Watch for typical pests, such as thrips, white fly, spider mites and aphids.

Not recommended 6-8 in.

4-9

March to October

18-20 wks, including 6 wks below 50°F (10°C)

No

PGRs generally not needed

Thrips, carnation mottle virus

18-20 wks, including 6 wks below 50°F (10°C)

(15-20 cm)

Not recommended 10-12 in. (25-30 cm)

4-9

March to October

18-20 wks, including 6 wks below 50°F (10°C) 18-20 wks, including 6 wks below 50°F (10°C) 18-20 wks, including 6 wks below 50°F (10°C)

No

PGRs generally not needed

Thrips, carnation mottle virus

18-20 wks, including 6 wks below 50°F (10°C) 18-20 wks, including 6 wks below 50°F (10°C) 18-20 wks, including 6 wks below 50°F (10°C)

Not recommended 8-10 in.

4-9

March to October

No

PGRs generally not needed

Thrips, carnation mottle virus

(20-25 cm)

Not recommended 5-6 in.

4-9

March to October

No

PGRs generally not needed

Thrips, carnation mottle virus

(13-15 cm)

PGRs generally not needed

Aphids, white fly, spider mites

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

18-24 in. (46-61 cm)

5-9

April to September;

Recommended for more flowers per plant. Not required.

Natural season flowering

22-24 in. (56-61 cm)

4-9

June to August

14-16 wks Spring plant; 11-13 wks Summer plant for Fall

None noted

14-16 wks Spring plant; 11-13

No

B-Nine/Cycocel combination at 3,750-5,000 ppm, B-Nine/500 ppm Cycocel before flowering. Sumagic spray can be used after flowering if needed. Do not use configure in finished containers.

wks Summer plant for Fall

Not recommended 10-12 wks

Not recommended 14-16 in. (36-41 cm)

4-9

June to August

PGRs generally not needed

Not particularly sensitive. Use well- drained media. Not particularly sensitive. Use well- drained media.

Only to remove premature flower buds. Only to remove premature flower buds.

Not recommended 10-12 wks

Liner: 16-18 wks

18-20 in. (46-51 cm)

4-9

June to August

Not recommended. 300 ppm Configure 2 weeks after transplant when greenhouse grown will reduce overall plant height.

Sumagic 5-10 ppm spray

Watch for bacterial infections.

6-8 wks

10-12 wks

12-14 wks

18-24 in. (46-61 cm)

6-8

March to September

Yes, a second pinch is often beneficial.

Recommended Concise/Sumagic 30-60 ppm spray

None noted

Not recommended Rooted: 20 wks

Rooted: 20 wks

36-48 in. (91-122 cm)

3-9

July to September

24-32 in. (61-81 cm)

4-9

July to October

Unrooted: 15-17 wks Rooted: 10-12 wks Natural flowering early July

PGRs generally not needed

Aphids, white fly, spider mites

Not recommended Unrooted: 15-17 wks Rooted: 10-12 wks Natural flowering in early July

One pinch, two to three weeks after transplant.

Not recommended Rooted: 8-10 wks Rooted: 10-12 wks

15-17 in. (38-43 cm)

5-9

June to October

Aphids, thrips, downy mildew, powdery mildew

Pinch at transplant.

B-Nine 3,750 ppm/ Cycocel 500 ppm as necessary before color. Sumagic 5-10 ppm after coloring.

12-18 in. (30-46 cm)

6-9

April to September

Unrooted: 14-16 wks, 3-5 ppp Rooted: 11-13 wks, 3-5 ppp

Recommended PGRs generally not needed

Pythium, rhizoctonia, botrytis

Unrooted: 10-13 wks Rooted: 7-10 wks

Unrooted: 12-15 wks, 2-3 ppp Rooted: 9-12 wks, 2-3 ppp

Recommended PGRs generally not needed

Spider mites, aphids Unrooted: 12-14 wks Rooted: 8-10 wks

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

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

16-18 in. (41-46 cm)

6-9

April to September

Recommended PGRs generally not needed

Spider mites, aphids Unrooted: 12-14 wks Rooted: 8-10 wks

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

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

14-16 in. (36-41 cm)

6-9

April to September

FINISHING GUIDE | 151

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