Darwin Perennials 2025 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 October to November

HEIGHT

No

None

Rust resistant

8-10 wks

14-16 wks

20-24 wks, 1 ppp

30-36 in. (76-91 cm)

5-9

No

PGRs generally not needed

Watch for crown rot if overwatered.

Not recommended Not recommended Liner: 16-18 wks

80-86 in. (203-218 cm)

5-9

September to October

No

None

Rust resistant

Not recommended 16-18 wks

24-26 wks, 1 ppp

72-102 in. (183-259 cm)

5-9

October to November

Recommended PGRs generally not needed

Powdery mildew may be present if grown under poor air circulation and high humidity. White fly, spider mites.

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

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

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

10-12 in. (25-30 cm)

4-9

June to July

Typically not required

PGRs generally not needed

Powdery mildew when pressure is high.

Not recommended 9-11 wks

10-12 wks

15-18 in. (38-46 cm)

4-9

June to July

Aphids, white fly, spider mites

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

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

28-36 in. (71-91 cm)

4-9

March to September

Not necessary when pinched in liner.

Use B-Nine/ Cycocel 2,500/800 ppm to control height

Recommended PGRs generally not needed

White fly

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

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

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

18 in. (46 cm)

4-8

May to September

Spider mites, thrips Not recommended 9-11 wks

10-12 wks

24-28 in. (61-71 cm)

4-9

April to September

Typically not required

B-Nine/ Cycocel sprays 2,500/1,000 ppm

Typically not required

PGRs generally not needed

Watch for crown rot if overwatered.

6-8 wks

10-12 wks

12-14 wks

3-6 in. (8-15 cm)

5-9

March to October

Yes

PGRs generally not needed

Spider mites, thrips. Watch for INSV/ TSWV.

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

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

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

12 in. (30 cm)

5-8

April to September

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)

5-9

May to August

Yes

PGRs generally not needed

White fly, spider mites

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

20-24 in. (51-61 cm)

5-9

June to August

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

20-24 in. (51-61 cm)

6-9

July to August

Yes

PGRs generally not needed

Spider mites

Not recommended Unrooted: 19-22 wks

Rooted: 12-14 wks

Recommended PGRs generally not needed

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

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

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

28-30 in. (71-76 cm)

4-9

July to September

Recommended PGRs generally not needed

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

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

18-24 in. (46-61 cm)

4-9

July to September

Rooted: 7-9 wks

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

6-8 in. (15-20 cm)

4-8

April to May

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.

Configure at 600 ppm to increase branching Configure at 600 ppm to increase branching Configure at 600 ppm to increase branching

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

16-18 in. (41-46 cm)

4-9

June to August

Powdery mildew when pressure is high.

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

18-20 in. (46-51 cm)

4-9

June to August

None

PGRs generally not needed

Pythium and rhizoctonia can result from overwatering.

6-8 wks

10-12 wks

12-14 wks

6-8 in. (15-20 cm)

5-9

April to June

Yes

PGRs generally not needed

White fly, thrips

Rooted: 6-8 wks

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

12-14 in. (30-36 cm)

7-9

March to September

Once for smaller pot sizes, twice for larger containers.

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)

7-10

March to September

FINISHING GUIDE | 159

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